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+#
+#
+#            Nim's Runtime Library
+#        (c) Copyright 2012 Andreas Rumpf
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+## Declaration of the Document Object Model for the `JavaScript backend
+## <backends.html#backends-the-javascript-target>`_.
+##
+##
+## Document Ready
+## --------------
+##
+## * Basic example of a document ready:
+runnableExamples"-b:js -r:off":
+  proc example(e: Event) = echo "Document is ready"
+  document.addEventListener("DOMContentLoaded", example)  # You can also use "load" event.
+## * This example runs 5 seconds after the document ready:
+runnableExamples"-b:js -r:off":
+  proc example() = echo "5 seconds after document ready"
+  proc domReady(e: Event) = discard setTimeout(example, 5_000) # Document is ready.
+  document.addEventListener("DOMContentLoaded", domReady)
+## Document onUnload
+## -----------------
+##
+## * Simple example of how to implement code that runs when the page unloads:
+runnableExamples"-b:js -r:off":
+  proc example(e: Event) = echo "Document is unloaded"
+  document.addEventListener("unload", example)  # You can also use "beforeunload".
+## Document Autorefresh
+## --------------------
+##
+## * Minimal example of a document autorefresh:
+runnableExamples"-b:js -r:off":
+  proc example() = window.location.reload()
+  discard setTimeout(example, 5_000)
+## - For more examples, see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
+
+
+import std/private/since
+when not defined(js):
+  {.error: "This module only works on the JavaScript platform".}
+
+const
+  DomApiVersion* = 3 ## the version of DOM API we try to follow. No guarantees though.
+
+type
+  EventTarget* {.importc.} = ref object of RootObj
+    onabort*: proc (event: Event) {.closure.}
+    onblur*: proc (event: Event) {.closure.}
+    onchange*: proc (event: Event) {.closure.}
+    onclick*: proc (event: Event) {.closure.}
+    ondblclick*: proc (event: Event) {.closure.}
+    onerror*: proc (event: Event) {.closure.}
+    onfocus*: proc (event: Event) {.closure.}
+    onkeydown*: proc (event: Event) {.closure.}
+    onkeypress*: proc (event: Event) {.closure.}
+    onkeyup*: proc (event: Event) {.closure.}
+    onload*: proc (event: Event) {.closure.}
+    onmousedown*: proc (event: Event) {.closure.}
+    onmousemove*: proc (event: Event) {.closure.}
+    onmouseout*: proc (event: Event) {.closure.}
+    onmouseover*: proc (event: Event) {.closure.}
+    onmouseup*: proc (event: Event) {.closure.}
+    onreset*: proc (event: Event) {.closure.}
+    onselect*: proc (event: Event) {.closure.}
+    onstorage*: proc (event: Event) {.closure.}
+    onsubmit*: proc (event: Event) {.closure.}
+    onunload*: proc (event: Event) {.closure.}
+    onloadstart*: proc (event: Event) {.closure.}
+    onprogress*: proc (event: Event) {.closure.}
+    onloadend*: proc (event: Event) {.closure.}
+
+  DomEvent* {.pure.} = enum
+    ## see `docs<https://developer.mozilla.org/en-US/docs/Web/Events>`_
+    Abort = "abort",
+    BeforeInput = "beforeinput",
+    Blur = "blur",
+    Click = "click",
+    CompositionEnd = "compositionend",
+    CompositionStart = "compositionstart",
+    CompositionUpdate = "compositionupdate",
+    DblClick = "dblclick",
+    Error = "error",
+    Focus = "focus",
+    FocusIn = "focusin",
+    FocusOut = "focusout",
+    Input = "input",
+    KeyDown = "keydown",
+    KeyPress = "keypress",
+    KeyUp = "keyup",
+    Load = "load",
+    MouseDown = "mousedown",
+    MouseEnter = "mouseenter",
+    MouseLeave = "mouseleave",
+    MouseMove = "mousemove",
+    MouseOut = "mouseout",
+    MouseOver = "mouseover",
+    MouseUp = "mouseup",
+    Resize = "resize",
+    Scroll = "scroll",
+    Select = "select",
+    Storage = "storage",
+    Unload = "unload",
+    Wheel = "wheel"
+
+  PerformanceMemory* {.importc.} = ref object
+    jsHeapSizeLimit*: float
+    totalJSHeapSize*: float
+    usedJSHeapSize*: float
+
+  PerformanceTiming* {.importc.} = ref object
+    connectStart*: float
+    domComplete*: float
+    domContentLoadedEventEnd*: float
+    domContentLoadedEventStart*: float
+    domInteractive*: float
+    domLoading*: float
+    domainLookupEnd*: float
+    domainLookupStart*: float
+    fetchStart*: float
+    loadEventEnd*: float
+    loadEventStart*: float
+    navigationStart*: float
+    redirectEnd*: float
+    redirectStart*: float
+    requestStart*: float
+    responseEnd*: float
+    responseStart*: float
+    secureConnectionStart*: float
+    unloadEventEnd*: float
+    unloadEventStart*: float
+
+  Performance* {.importc.} = ref object
+    memory*: PerformanceMemory
+    timing*: PerformanceTiming
+
+  Range* {.importc.} = ref object
+    ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/Range>`_
+    collapsed*: bool
+    commonAncestorContainer*: Node
+    endContainer*: Node
+    endOffset*: int
+    startContainer*: Node
+    startOffset*: int
+
+  Selection* {.importc.} = ref object
+    ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/Selection>`_
+    anchorNode*: Node
+    anchorOffset*: int
+    focusNode*: Node
+    focusOffset*: int
+    isCollapsed*: bool
+    rangeCount*: int
+    `type`*: cstring
+
+  Storage* {.importc.} = ref object
+
+  Window* {.importc.} = ref object of EventTarget
+    document*: Document
+    event*: Event
+    history*: History
+    location*: Location
+    closed*: bool
+    defaultStatus*: cstring
+    devicePixelRatio*: float
+    innerHeight*, innerWidth*: int
+    locationbar*: ref LocationBar
+    menubar*: ref MenuBar
+    name*: cstring
+    outerHeight*, outerWidth*: int
+    pageXOffset*, pageYOffset*: int
+    scrollX*: float
+    scrollY*: float
+    personalbar*: ref PersonalBar
+    scrollbars*: ref ScrollBars
+    statusbar*: ref StatusBar
+    status*: cstring
+    toolbar*: ref ToolBar
+    frames*: seq[Frame]
+    screen*: Screen
+    performance*: Performance
+    onpopstate*: proc (event: Event)
+    localStorage*: Storage
+    sessionStorage*: Storage
+    parent*: Window
+
+  Frame* {.importc.} = ref object of Window
+
+  ClassList* {.importc.} = ref object of RootObj
+
+  NodeType* = enum
+    ElementNode = 1,
+    AttributeNode,
+    TextNode,
+    CDATANode,
+    EntityRefNode,
+    EntityNode,
+    ProcessingInstructionNode,
+    CommentNode,
+    DocumentNode,
+    DocumentTypeNode,
+    DocumentFragmentNode,
+    NotationNode
+
+  Node* {.importc.} = ref object of EventTarget
+    attributes*: seq[Node]
+    childNodes*: seq[Node]
+    children*: seq[Node]
+    data*: cstring
+    firstChild*: Node
+    lastChild*: Node
+    nextSibling*: Node
+    nodeName*: cstring
+    nodeType*: NodeType
+    nodeValue*: cstring
+    parentNode*: Node
+    content*: Node
+    previousSibling*: Node
+    ownerDocument*: Document
+    innerHTML*: cstring
+    outerHTML*: cstring
+    innerText*: cstring
+    textContent*: cstring
+    style*: Style
+    baseURI*: cstring
+    parentElement*: Element
+    isConnected*: bool
+
+  Document* {.importc.} = ref object of Node
+    activeElement*: Element
+    documentElement*: Element
+    alinkColor*: cstring
+    bgColor*: cstring
+    body*: Element
+    charset*: cstring
+    cookie*: cstring
+    defaultCharset*: cstring
+    fgColor*: cstring
+    head*: Element
+    hidden*: bool
+    lastModified*: cstring
+    linkColor*: cstring
+    referrer*: cstring
+    title*: cstring
+    URL*: cstring
+    visibilityState*: cstring
+    vlinkColor*: cstring
+    anchors*: seq[AnchorElement]
+    forms*: seq[FormElement]
+    images*: seq[ImageElement]
+    applets*: seq[Element]
+    embeds*: seq[EmbedElement]
+    links*: seq[LinkElement]
+    fonts*: FontFaceSet
+
+  Element* {.importc.} = ref object of Node
+    className*: cstring
+    classList*: ClassList
+    checked*: bool
+    defaultChecked*: bool
+    defaultValue*: cstring
+    disabled*: bool
+    form*: FormElement
+    name*: cstring
+    readOnly*: bool
+    options*: seq[OptionElement]
+    selectedOptions*: seq[OptionElement]
+    clientWidth*, clientHeight*: int
+    contentEditable*: cstring
+    isContentEditable*: bool
+    dir*: cstring
+    offsetHeight*: int
+    offsetWidth*: int
+    offsetLeft*: int
+    offsetTop*: int
+
+  ValidityState* {.importc.} = ref object ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/ValidityState>`_
+    badInput*: bool
+    customError*: bool
+    patternMismatch*: bool
+    rangeOverflow*: bool
+    rangeUnderflow*: bool
+    stepMismatch*: bool
+    tooLong*: bool
+    tooShort*: bool
+    typeMismatch*: bool
+    valid*: bool
+    valueMissing*: bool
+
+  Blob* {.importc.} = ref object of RootObj ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/Blob>`_
+    size*: int
+    `type`*: cstring
+
+  File* {.importc.} = ref object of Blob ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/File>`_
+    lastModified*: int
+    name*: cstring
+
+  TextAreaElement* {.importc.} = ref object of Element ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/HTMLTextAreaElement>`_
+    value*: cstring
+    selectionStart*, selectionEnd*: int
+    selectionDirection*: cstring
+    rows*, cols*: int
+
+  InputElement* {.importc.} = ref object of Element ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement>`_
+    # Properties related to the parent form
+    formAction*: cstring
+    formEncType*: cstring
+    formMethod*: cstring
+    formNoValidate*: bool
+    formTarget*: cstring
+
+    # Properties that apply to any type of input element that is not hidden
+    `type`*: cstring
+    autofocus*: bool
+    required*: bool
+    value*: cstring
+    validity*: ValidityState
+    validationMessage*: cstring
+    willValidate*: bool
+
+    # Properties that apply only to elements of type "checkbox" or "radio"
+    indeterminate*: bool
+
+    # Properties that apply only to elements of type "image"
+    alt*: cstring
+    height*: cstring
+    src*: cstring
+    width*: cstring
+
+    # Properties that apply only to elements of type "file"
+    accept*: cstring
+    files*: seq[Blob]
+
+    # Properties that apply only to text/number-containing or elements
+    autocomplete*: cstring
+    maxLength*: int
+    size*: int
+    pattern*: cstring
+    placeholder*: cstring
+    min*: cstring
+    max*: cstring
+    selectionStart*: int
+    selectionEnd*: int
+    selectionDirection*: cstring
+
+    # Properties not yet categorized
+    dirName*: cstring
+    accessKey*: cstring
+    list*: Element
+    multiple*: bool
+    labels*: seq[Element]
+    step*: cstring
+    valueAsDate*: cstring
+    valueAsNumber*: float
+
+  LinkElement* {.importc.} = ref object of Element
+    target*: cstring
+    text*: cstring
+    x*: int
+    y*: int
+
+  EmbedElement* {.importc.} = ref object of Element
+    height*: int
+    hspace*: int
+    src*: cstring
+    width*: int
+    `type`*: cstring
+    vspace*: int
+
+  AnchorElement* {.importc.} = ref object of Element
+    text*: cstring
+    x*, y*: int
+
+  OptionElement* {.importc.} = ref object of Element
+    defaultSelected*: bool
+    selected*: bool
+    selectedIndex*: int
+    text*: cstring
+    value*: cstring
+
+  FormElement* {.importc.} = ref object of Element ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement>`_
+    acceptCharset*: cstring
+    action*: cstring
+    autocomplete*: cstring
+    elements*: seq[Element]
+    encoding*: cstring
+    enctype*: cstring
+    length*: int
+    `method`*: cstring
+    noValidate*: bool
+    target*: cstring
+
+  ImageElement* {.importc.} = ref object of Element
+    border*: int
+    complete*: bool
+    height*: int
+    hspace*: int
+    lowsrc*: cstring
+    src*: cstring
+    vspace*: int
+    width*: int
+
+  Style* {.importc.} = ref object of RootObj
+    alignContent*: cstring
+    alignItems*: cstring
+    alignSelf*: cstring
+    all*: cstring
+    animation*: cstring
+    animationDelay*: cstring
+    animationDirection*: cstring
+    animationDuration*: cstring
+    animationFillMode*: cstring
+    animationIterationCount*: cstring
+    animationName*: cstring
+    animationPlayState*: cstring
+    animationTimingFunction*: cstring
+    backdropFilter*: cstring
+    backfaceVisibility*: cstring
+    background*: cstring
+    backgroundAttachment*: cstring
+    backgroundBlendMode*: cstring
+    backgroundClip*: cstring
+    backgroundColor*: cstring
+    backgroundImage*: cstring
+    backgroundOrigin*: cstring
+    backgroundPosition*: cstring
+    backgroundRepeat*: cstring
+    backgroundSize*: cstring
+    blockSize*: cstring
+    border*: cstring
+    borderBlock*: cstring
+    borderBlockColor*: cstring
+    borderBlockEnd*: cstring
+    borderBlockEndColor*: cstring
+    borderBlockEndStyle*: cstring
+    borderBlockEndWidth*: cstring
+    borderBlockStart*: cstring
+    borderBlockStartColor*: cstring
+    borderBlockStartStyle*: cstring
+    borderBlockStartWidth*: cstring
+    borderBlockStyle*: cstring
+    borderBlockWidth*: cstring
+    borderBottom*: cstring
+    borderBottomColor*: cstring
+    borderBottomLeftRadius*: cstring
+    borderBottomRightRadius*: cstring
+    borderBottomStyle*: cstring
+    borderBottomWidth*: cstring
+    borderCollapse*: cstring
+    borderColor*: cstring
+    borderEndEndRadius*: cstring
+    borderEndStartRadius*: cstring
+    borderImage*: cstring
+    borderImageOutset*: cstring
+    borderImageRepeat*: cstring
+    borderImageSlice*: cstring
+    borderImageSource*: cstring
+    borderImageWidth*: cstring
+    borderInline*: cstring
+    borderInlineColor*: cstring
+    borderInlineEnd*: cstring
+    borderInlineEndColor*: cstring
+    borderInlineEndStyle*: cstring
+    borderInlineEndWidth*: cstring
+    borderInlineStart*: cstring
+    borderInlineStartColor*: cstring
+    borderInlineStartStyle*: cstring
+    borderInlineStartWidth*: cstring
+    borderInlineStyle*: cstring
+    borderInlineWidth*: cstring
+    borderLeft*: cstring
+    borderLeftColor*: cstring
+    borderLeftStyle*: cstring
+    borderLeftWidth*: cstring
+    borderRadius*: cstring
+    borderRight*: cstring
+    borderRightColor*: cstring
+    borderRightStyle*: cstring
+    borderRightWidth*: cstring
+    borderSpacing*: cstring
+    borderStartEndRadius*: cstring
+    borderStartStartRadius*: cstring
+    borderStyle*: cstring
+    borderTop*: cstring
+    borderTopColor*: cstring
+    borderTopLeftRadius*: cstring
+    borderTopRightRadius*: cstring
+    borderTopStyle*: cstring
+    borderTopWidth*: cstring
+    borderWidth*: cstring
+    bottom*: cstring
+    boxDecorationBreak*: cstring
+    boxShadow*: cstring
+    boxSizing*: cstring
+    breakAfter*: cstring
+    breakBefore*: cstring
+    breakInside*: cstring
+    captionSide*: cstring
+    caretColor*: cstring
+    clear*: cstring
+    clip*: cstring
+    clipPath*: cstring
+    color*: cstring
+    colorAdjust*: cstring
+    columnCount*: cstring
+    columnFill*: cstring
+    columnGap*: cstring
+    columnRule*: cstring
+    columnRuleColor*: cstring
+    columnRuleStyle*: cstring
+    columnRuleWidth*: cstring
+    columnSpan*: cstring
+    columnWidth*: cstring
+    columns*: cstring
+    contain*: cstring
+    content*: cstring
+    counterIncrement*: cstring
+    counterReset*: cstring
+    counterSet*: cstring
+    cursor*: cstring
+    direction*: cstring
+    display*: cstring
+    emptyCells*: cstring
+    filter*: cstring
+    flex*: cstring
+    flexBasis*: cstring
+    flexDirection*: cstring
+    flexFlow*: cstring
+    flexGrow*: cstring
+    flexShrink*: cstring
+    flexWrap*: cstring
+    cssFloat*: cstring
+    font*: cstring
+    fontFamily*: cstring
+    fontFeatureSettings*: cstring
+    fontKerning*: cstring
+    fontLanguageOverride*: cstring
+    fontOpticalSizing*: cstring
+    fontSize*: cstring
+    fontSizeAdjust*: cstring
+    fontStretch*: cstring
+    fontStyle*: cstring
+    fontSynthesis*: cstring
+    fontVariant*: cstring
+    fontVariantAlternates*: cstring
+    fontVariantCaps*: cstring
+    fontVariantEastAsian*: cstring
+    fontVariantLigatures*: cstring
+    fontVariantNumeric*: cstring
+    fontVariantPosition*: cstring
+    fontVariationSettings*: cstring
+    fontWeight*: cstring
+    gap*: cstring
+    grid*: cstring
+    gridArea*: cstring
+    gridAutoColumns*: cstring
+    gridAutoFlow*: cstring
+    gridAutoRows*: cstring
+    gridColumn*: cstring
+    gridColumnEnd*: cstring
+    gridColumnStart*: cstring
+    gridRow*: cstring
+    gridRowEnd*: cstring
+    gridRowStart*: cstring
+    gridTemplate*: cstring
+    gridTemplateAreas*: cstring
+    gridTemplateColumns*: cstring
+    gridTemplateRows*: cstring
+    hangingPunctuation*: cstring
+    height*: cstring
+    hyphens*: cstring
+    imageOrientation*: cstring
+    imageRendering*: cstring
+    inlineSize*: cstring
+    inset*: cstring
+    insetBlock*: cstring
+    insetBlockEnd*: cstring
+    insetBlockStart*: cstring
+    insetInline*: cstring
+    insetInlineEnd*: cstring
+    insetInlineStart*: cstring
+    isolation*: cstring
+    justifyContent*: cstring
+    justifyItems*: cstring
+    justifySelf*: cstring
+    left*: cstring
+    letterSpacing*: cstring
+    lineBreak*: cstring
+    lineHeight*: cstring
+    listStyle*: cstring
+    listStyleImage*: cstring
+    listStylePosition*: cstring
+    listStyleType*: cstring
+    margin*: cstring
+    marginBlock*: cstring
+    marginBlockEnd*: cstring
+    marginBlockStart*: cstring
+    marginBottom*: cstring
+    marginInline*: cstring
+    marginInlineEnd*: cstring
+    marginInlineStart*: cstring
+    marginLeft*: cstring
+    marginRight*: cstring
+    marginTop*: cstring
+    mask*: cstring
+    maskBorder*: cstring
+    maskBorderMode*: cstring
+    maskBorderOutset*: cstring
+    maskBorderRepeat*: cstring
+    maskBorderSlice*: cstring
+    maskBorderSource*: cstring
+    maskBorderWidth*: cstring
+    maskClip*: cstring
+    maskComposite*: cstring
+    maskImage*: cstring
+    maskMode*: cstring
+    maskOrigin*: cstring
+    maskPosition*: cstring
+    maskRepeat*: cstring
+    maskSize*: cstring
+    maskType*: cstring
+    maxBlockSize*: cstring
+    maxHeight*: cstring
+    maxInlineSize*: cstring
+    maxWidth*: cstring
+    minBlockSize*: cstring
+    minHeight*: cstring
+    minInlineSize*: cstring
+    minWidth*: cstring
+    mixBlendMode*: cstring
+    objectFit*: cstring
+    objectPosition*: cstring
+    offset*: cstring
+    offsetAnchor*: cstring
+    offsetDistance*: cstring
+    offsetPath*: cstring
+    offsetRotate*: cstring
+    opacity*: cstring
+    order*: cstring
+    orphans*: cstring
+    outline*: cstring
+    outlineColor*: cstring
+    outlineOffset*: cstring
+    outlineStyle*: cstring
+    outlineWidth*: cstring
+    overflow*: cstring
+    overflowAnchor*: cstring
+    overflowBlock*: cstring
+    overflowInline*: cstring
+    overflowWrap*: cstring
+    overflowX*: cstring
+    overflowY*: cstring
+    overscrollBehavior*: cstring
+    overscrollBehaviorBlock*: cstring
+    overscrollBehaviorInline*: cstring
+    overscrollBehaviorX*: cstring
+    overscrollBehaviorY*: cstring
+    padding*: cstring
+    paddingBlock*: cstring
+    paddingBlockEnd*: cstring
+    paddingBlockStart*: cstring
+    paddingBottom*: cstring
+    paddingInline*: cstring
+    paddingInlineEnd*: cstring
+    paddingInlineStart*: cstring
+    paddingLeft*: cstring
+    paddingRight*: cstring
+    paddingTop*: cstring
+    pageBreakAfter*: cstring
+    pageBreakBefore*: cstring
+    pageBreakInside*: cstring
+    paintOrder*: cstring
+    perspective*: cstring
+    perspectiveOrigin*: cstring
+    placeContent*: cstring
+    placeItems*: cstring
+    placeSelf*: cstring
+    pointerEvents*: cstring
+    position*: cstring
+    quotes*: cstring
+    resize*: cstring
+    right*: cstring
+    rotate*: cstring
+    rowGap*: cstring
+    scale*: cstring
+    scrollBehavior*: cstring
+    scrollMargin*: cstring
+    scrollMarginBlock*: cstring
+    scrollMarginBlockEnd*: cstring
+    scrollMarginBlockStart*: cstring
+    scrollMarginBottom*: cstring
+    scrollMarginInline*: cstring
+    scrollMarginInlineEnd*: cstring
+    scrollMarginInlineStart*: cstring
+    scrollMarginLeft*: cstring
+    scrollMarginRight*: cstring
+    scrollMarginTop*: cstring
+    scrollPadding*: cstring
+    scrollPaddingBlock*: cstring
+    scrollPaddingBlockEnd*: cstring
+    scrollPaddingBlockStart*: cstring
+    scrollPaddingBottom*: cstring
+    scrollPaddingInline*: cstring
+    scrollPaddingInlineEnd*: cstring
+    scrollPaddingInlineStart*: cstring
+    scrollPaddingLeft*: cstring
+    scrollPaddingRight*: cstring
+    scrollPaddingTop*: cstring
+    scrollSnapAlign*: cstring
+    scrollSnapStop*: cstring
+    scrollSnapType*: cstring
+    scrollbar3dLightColor*: cstring
+    scrollbarArrowColor*: cstring
+    scrollbarBaseColor*: cstring
+    scrollbarColor*: cstring
+    scrollbarDarkshadowColor*: cstring
+    scrollbarFaceColor*: cstring
+    scrollbarHighlightColor*: cstring
+    scrollbarShadowColor*: cstring
+    scrollbarTrackColor*: cstring
+    scrollbarWidth*: cstring
+    shapeImageThreshold*: cstring
+    shapeMargin*: cstring
+    shapeOutside*: cstring
+    tabSize*: cstring
+    tableLayout*: cstring
+    textAlign*: cstring
+    textAlignLast*: cstring
+    textCombineUpright*: cstring
+    textDecoration*: cstring
+    textDecorationColor*: cstring
+    textDecorationLine*: cstring
+    textDecorationSkipInk*: cstring
+    textDecorationStyle*: cstring
+    textDecorationThickness*: cstring
+    textEmphasis*: cstring
+    textEmphasisColor*: cstring
+    textEmphasisPosition*: cstring
+    textEmphasisStyle*: cstring
+    textIndent*: cstring
+    textJustify*: cstring
+    textOrientation*: cstring
+    textOverflow*: cstring
+    textRendering*: cstring
+    textShadow*: cstring
+    textTransform*: cstring
+    textUnderlineOffset*: cstring
+    textUnderlinePosition*: cstring
+    top*: cstring
+    touchAction*: cstring
+    transform*: cstring
+    transformBox*: cstring
+    transformOrigin*: cstring
+    transformStyle*: cstring
+    transition*: cstring
+    transitionDelay*: cstring
+    transitionDuration*: cstring
+    transitionProperty*: cstring
+    transitionTimingFunction*: cstring
+    translate*: cstring
+    unicodeBidi*: cstring
+    verticalAlign*: cstring
+    visibility*: cstring
+    whiteSpace*: cstring
+    widows*: cstring
+    width*: cstring
+    willChange*: cstring
+    wordBreak*: cstring
+    wordSpacing*: cstring
+    writingMode*: cstring
+    zIndex*: cstring
+
+  EventPhase* = enum
+    None = 0,
+    CapturingPhase,
+    AtTarget,
+    BubblingPhase
+
+  Event* {.importc.} = ref object of RootObj ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/Event>`_
+    bubbles*: bool
+    cancelBubble*: bool
+    cancelable*: bool
+    composed*: bool
+    currentTarget*: Node
+    defaultPrevented*: bool
+    eventPhase*: int
+    target*: Node
+    `type`*: cstring
+    isTrusted*: bool
+
+  UIEvent* {.importc.} = ref object of Event ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/UIEvent>`_
+    detail*: int64
+    view*: Window
+
+  KeyboardEvent* {.importc.} = ref object of UIEvent ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent>`_
+    altKey*, ctrlKey*, metaKey*, shiftKey*: bool
+    code*: cstring
+    isComposing*: bool
+    key*: cstring
+    keyCode*: int
+    location*: int
+
+  KeyboardEventKey* {.pure.} = enum ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values>`_
+    # Modifier keys
+    Alt,
+    AltGraph,
+    CapsLock,
+    Control,
+    Fn,
+    FnLock,
+    Hyper,
+    Meta,
+    NumLock,
+    ScrollLock,
+    Shift,
+    Super,
+    Symbol,
+    SymbolLock,
+
+    # Whitespace keys
+    ArrowDown,
+    ArrowLeft,
+    ArrowRight,
+    ArrowUp,
+    End,
+    Home,
+    PageDown,
+    PageUp,
+
+    # Editing keys
+    Backspace,
+    Clear,
+    Copy,
+    CrSel,
+    Cut,
+    Delete,
+    EraseEof,
+    ExSel,
+    Insert,
+    Paste,
+    Redo,
+    Undo,
+
+    # UI keys
+    Accept,
+    Again,
+    Attn,
+    Cancel,
+    ContextMenu,
+    Escape,
+    Execute,
+    Find,
+    Finish,
+    Help,
+    Pause,
+    Play,
+    Props,
+    Select,
+    ZoomIn,
+    ZoomOut,
+
+    # Device keys
+    BrigtnessDown,
+    BrigtnessUp,
+    Eject,
+    LogOff,
+    Power,
+    PowerOff,
+    PrintScreen,
+    Hibernate,
+    Standby,
+    WakeUp,
+
+    # Common IME keys
+    AllCandidates,
+    Alphanumeric,
+    CodeInput,
+    Compose,
+    Convert,
+    Dead,
+    FinalMode,
+    GroupFirst,
+    GroupLast,
+    GroupNext,
+    GroupPrevious,
+    ModeChange,
+    NextCandidate,
+    NonConvert,
+    PreviousCandidate,
+    Process,
+    SingleCandidate,
+
+    # Korean keyboards only
+    HangulMode,
+    HanjaMode,
+    JunjaMode,
+
+    # Japanese keyboards only
+    Eisu,
+    Hankaku,
+    Hiragana,
+    HiraganaKatakana,
+    KanaMode,
+    KanjiMode,
+    Katakana,
+    Romaji,
+    Zenkaku,
+    ZenkakuHanaku,
+
+    # Function keys
+    F1,
+    F2,
+    F3,
+    F4,
+    F5,
+    F6,
+    F7,
+    F8,
+    F9,
+    F10,
+    F11,
+    F12,
+    F13,
+    F14,
+    F15,
+    F16,
+    F17,
+    F18,
+    F19,
+    F20,
+    Soft1,
+    Soft2,
+    Soft3,
+    Soft4,
+
+    # Phone keys
+    AppSwitch,
+    Call,
+    Camera,
+    CameraFocus,
+    EndCall,
+    GoBack,
+    GoHome,
+    HeadsetHook,
+    LastNumberRedial,
+    Notification,
+    MannerMode,
+    VoiceDial,
+
+    # Multimedia keys
+    ChannelDown,
+    ChannelUp,
+    MediaFastForward,
+    MediaPause,
+    MediaPlay,
+    MediaPlayPause,
+    MediaRecord,
+    MediaRewind,
+    MediaStop,
+    MediaTrackNext,
+    MediaTrackPrevious,
+
+    # Audio control keys
+    AudioBalanceLeft,
+    AudioBalanceRight,
+    AudioBassDown,
+    AudioBassBoostDown,
+    AudioBassBoostToggle,
+    AudioBassBoostUp,
+    AudioBassUp,
+    AudioFaderFront,
+    AudioFaderRear,
+    AudioSurroundModeNext,
+    AudioTrebleDown,
+    AudioTrebleUp,
+    AudioVolumeDown,
+    AUdioVolumeMute,
+    AudioVolumeUp,
+    MicrophoneToggle,
+    MicrophoneVolumeDown,
+    MicrophoneVolumeMute,
+    MicrophoneVolumeUp,
+
+    # TV control keys
+    TV,
+    TV3DMode,
+    TVAntennaCable,
+    TVAudioDescription,
+    TVAudioDescriptionMixDown,
+    TVAudioDescriptionMixUp,
+    TVContentsMenu,
+    TVDataService,
+    TVInput,
+    TVInputComponent1,
+    TVInputComponent2,
+    TVInputComposite1,
+    TVInputComposite2,
+    TVInputHDMI1,
+    TVInputHDMI2,
+    TVInputHDMI3,
+    TVInputHDMI4,
+    TVInputVGA1,
+    TVMediaContext,
+    TVNetwork,
+    TVNumberEntry,
+    TVPower,
+    TVRadioService,
+    TVSatellite,
+    TVSatelliteBS,
+    TVSatelliteCS,
+    TVSatelliteToggle,
+    TVTerrestrialAnalog,
+    TVTerrestrialDigital,
+    TVTimer,
+
+    # Media controller keys
+    AVRInput,
+    AVRPower,
+    ColorF0Red,
+    ColorF1Green,
+    ColorF2Yellow,
+    ColorF3Blue,
+    ColorF4Grey,
+    ColorF5Brown,
+    ClosedCaptionToggle,
+    Dimmer,
+    DisplaySwap,
+    DVR,
+    Exit,
+    FavoriteClear0,
+    FavoriteClear1,
+    FavoriteClear2,
+    FavoriteClear3,
+    FavoriteRecall0,
+    FavoriteRecall1,
+    FavoriteRecall2,
+    FavoriteRecall3,
+    FavoriteStore0,
+    FavoriteStore1,
+    FavoriteStore2,
+    FavoriteStore3,
+    Guide,
+    GuideNextDay,
+    GuidePreviousDay,
+    Info,
+    InstantReplay,
+    Link,
+    ListProgram,
+    LiveContent,
+    Lock,
+    MediaApps,
+    MediaAudioTrack,
+    MediaLast,
+    MediaSkipBackward,
+    MediaSkipForward,
+    MediaStepBackward,
+    MediaStepForward,
+    MediaTopMenu,
+    NavigateIn,
+    NavigateNext,
+    NavigateOut,
+    NavigatePrevious,
+    NextFavoriteChannel,
+    NextUserProfile,
+    OnDemand,
+    Pairing,
+    PinPDown,
+    PinPMove,
+    PinPUp,
+    PlaySpeedDown,
+    PlaySpeedReset,
+    PlaySpeedUp,
+    RandomToggle,
+    RcLowBattery,
+    RecordSpeedNext,
+    RfBypass,
+    ScanChannelsToggle,
+    ScreenModeNext,
+    Settings,
+    SplitScreenToggle,
+    STBInput,
+    STBPower,
+    Subtitle,
+    Teletext,
+    VideoModeNext,
+    Wink,
+    ZoomToggle,
+
+    # Speech recognition keys
+    SpeechCorrectionList,
+    SpeechInputToggle,
+
+    # Document keys
+    Close,
+    New,
+    Open,
+    Print,
+    Save,
+    SpellCheck,
+    MailForward,
+    MailReply,
+    MailSend,
+
+    # Application selector keys
+    LaunchCalculator,
+    LaunchCalendar,
+    LaunchContacts,
+    LaunchMail,
+    LaunchMediaPlayer,
+    LaunchMusicPlayer,
+    LaunchMyComputer,
+    LaunchPhone,
+    LaunchScreenSaver,
+    LaunchSpreadsheet,
+    LaunchWebBrowser,
+    LaunchWebCam,
+    LaunchWordProcessor,
+    LaunchApplication1,
+    LaunchApplication2,
+    LaunchApplication3,
+    LaunchApplication4,
+    LaunchApplication5,
+    LaunchApplication6,
+    LaunchApplication7,
+    LaunchApplication8,
+    LaunchApplication9,
+    LaunchApplication10,
+    LaunchApplication11,
+    LaunchApplication12,
+    LaunchApplication13,
+    LaunchApplication14,
+    LaunchApplication15,
+    LaunchApplication16,
+
+    # Browser control keys
+    BrowserBack,
+    BrowserFavorites,
+    BrowserForward,
+    BrowserHome,
+    BrowserRefresh,
+    BrowserSearch,
+    BrowserStop,
+
+    # Numeric keypad keys
+    Key11,
+    Key12,
+    Separator
+
+  MouseButtons* = enum
+    NoButton = 0,
+    PrimaryButton = 1,
+    SecondaryButton = 2,
+    AuxilaryButton = 4,
+    FourthButton = 8,
+    FifthButton = 16
+
+  MouseEvent* {.importc.} = ref object of UIEvent ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent>`_
+    altKey*, ctrlKey*, metaKey*, shiftKey*: bool
+    button*: int
+    buttons*: int
+    clientX*, clientY*: int
+    movementX*, movementY*: int
+    offsetX*, offsetY*: int
+    pageX*, pageY*: int
+    relatedTarget*: EventTarget
+    #region*: cstring
+    screenX*, screenY*: int
+    x*, y*: int
+
+  DataTransferItemKind* {.pure.} = enum
+    File = "file",
+    String = "string"
+
+  DataTransferItem* {.importc.} = ref object of RootObj ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/DataTransferItem>`_
+    kind*: cstring
+    `type`*: cstring
+
+  DataTransfer* {.importc.} = ref object of RootObj ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/DataTransfer>`_
+    dropEffect*: cstring
+    effectAllowed*: cstring
+    files*: seq[Element]
+    items*: seq[DataTransferItem]
+    types*: seq[cstring]
+
+  DataTransferDropEffect* {.pure.} = enum
+    None = "none",
+    Copy = "copy",
+    Link = "link",
+    Move = "move"
+
+  DataTransferEffectAllowed* {.pure.} = enum
+    None = "none",
+    Copy = "copy",
+    CopyLink = "copyLink",
+    CopyMove = "copyMove",
+    Link = "link",
+    LinkMove = "linkMove",
+    Move = "move",
+    All = "all",
+    Uninitialized = "uninitialized"
+
+  DragEventTypes* = enum
+    Drag = "drag",
+    DragEnd = "dragend",
+    DragEnter = "dragenter",
+    DragExit = "dragexit",
+    DragLeave = "dragleave",
+    DragOver = "dragover",
+    DragStart = "dragstart",
+    Drop = "drop"
+
+  DragEvent* {.importc.} = object of MouseEvent
+    ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/DragEvent>`_
+    dataTransfer*: DataTransfer
+
+  ClipboardEvent* {.importc.} = object of Event
+    ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/ClipboardEvent>`_
+    clipboardData*: DataTransfer
+
+  StorageEvent* {.importc.} = ref object of Event ## see `docs<https://developer.mozilla.org/en-US/docs/Web/API/StorageEvent>`_
+    key*: cstring
+    newValue*, oldValue*: cstring
+    storageArea*: Storage
+    url*: cstring
+
+  TouchList* {.importc.} = ref object of RootObj
+    length*: int
+
+  Touch* {.importc.} = ref object of RootObj
+    identifier*: int
+    screenX*, screenY*, clientX*, clientY*, pageX*, pageY*: int
+    target*: Element
+    radiusX*, radiusY*: int
+    rotationAngle*: int
+    force*: float
+
+  TouchEvent* {.importc.} = ref object of UIEvent
+    changedTouches*, targetTouches*, touches*: seq[Touch]
+
+  Location* {.importc.} = ref object of RootObj
+    hash*: cstring
+    host*: cstring
+    hostname*: cstring
+    href*: cstring
+    pathname*: cstring
+    port*: cstring
+    protocol*: cstring
+    search*: cstring
+    origin*: cstring
+
+  History* {.importc.} = ref object of RootObj
+    length*: int
+
+  Navigator* {.importc.} = ref object of RootObj
+    appCodeName*: cstring
+    appName*: cstring
+    appVersion*: cstring
+    buildID*: cstring        ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/buildID
+    cookieEnabled*: bool
+    deviceMemory*: float     ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/deviceMemory
+    doNotTrack*: cstring     ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/doNotTrack
+    language*: cstring
+    languages*: seq[cstring] ## https://developer.mozilla.org/en-US/docs/Web/API/NavigatorLanguage/languages
+    maxTouchPoints*: cint    ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/maxTouchPoints
+    onLine*: bool            ## https://developer.mozilla.org/en-US/docs/Web/API/NavigatorOnLine/onLine
+    oscpu*: cstring          ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/oscpu
+    platform*: cstring
+    userAgent*: cstring
+    vendor*: cstring         ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/vendor
+    webdriver*: bool         ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/webdriver
+    mimeTypes*: seq[ref MimeType]
+
+  Plugin* {.importc.} = object of RootObj
+    description*: cstring
+    filename*: cstring
+    name*: cstring
+
+  MimeType* {.importc.} = object of RootObj
+    description*: cstring
+    enabledPlugin*: ref Plugin
+    suffixes*: seq[cstring]
+    `type`*: cstring
+
+  LocationBar* {.importc.} = object of RootObj
+    visible*: bool
+  MenuBar* = LocationBar
+  PersonalBar* = LocationBar
+  ScrollBars* = LocationBar
+  ToolBar* = LocationBar
+  StatusBar* = LocationBar
+
+  Screen* {.importc.} = ref object of RootObj
+    availHeight*: int
+    availWidth*: int
+    colorDepth*: int
+    height*: int
+    pixelDepth*: int
+    width*: int
+
+  TimeOut* {.importc.} = ref object of RootObj
+  Interval* {.importc.} = ref object of RootObj
+
+  AddEventListenerOptions* = object
+    capture*: bool
+    once*: bool
+    passive*: bool
+
+  FontFaceSetReady* {.importc.} = ref object
+    ## see: `docs<https://developer.mozilla.org/en-US/docs/Web/API/FontFaceSet/ready>`_
+    then*: proc(cb: proc())
+
+  FontFaceSet* {.importc.} = ref object
+    ## see: `docs<https://developer.mozilla.org/en-US/docs/Web/API/FontFaceSet>`_
+    ready*: FontFaceSetReady
+    onloadingdone*: proc(event: Event)
+
+  ScrollIntoViewOptions* = object
+    behavior*: cstring
+    `block`*: cstring
+    inline*: cstring
+
+  MediaQueryList* {.importc.} = ref object of EventTarget
+    matches*: bool
+    media*: cstring
+
+since (1, 3):
+  type
+    DomParser* = ref object
+      ## DOM Parser object (defined on browser only, may not be on NodeJS).
+      ## * https://developer.mozilla.org/en-US/docs/Web/API/DOMParser
+      ##
+      ##   ```nim
+      ##   let prsr = newDomParser()
+      ##   discard prsr.parseFromString("<html><marquee>Hello World</marquee></html>".cstring, "text/html".cstring)
+      ##   ```
+
+    DomException* {.importc.} = ref object
+      ## The DOMException interface represents an abnormal event (called an exception)
+      ## which occurs as a result of calling a method or accessing a property of a web API.
+      ## Each exception has a name, which is a short "CamelCase" style string identifying
+      ## the error or abnormal condition.
+      ## https://developer.mozilla.org/en-US/docs/Web/API/DOMException
+
+    FileReader* {.importc.} = ref object of EventTarget
+      ## The FileReader object lets web applications asynchronously read the contents of files
+      ## (or raw data buffers) stored on the user's computer, using File or Blob objects to specify
+      ## the file or data to read.
+      ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader
+
+    FileReaderState* = distinct range[0'u16..2'u16]
+    RootNodeOptions* = object of RootObj
+      composed*: bool
+    DocumentOrShadowRoot* {.importc.} = object of RootObj
+      activeElement*: Element
+      # styleSheets*: StyleSheetList
+    ShadowRoot* {.importc.} = ref object of DocumentOrShadowRoot
+      delegatesFocus*: bool
+      host*: Element
+      innerHTML*: cstring
+      mode*: cstring # "open" or "closed"
+    ShadowRootInit* = object of RootObj
+      mode*: cstring
+      delegatesFocus*: bool
+
+    HTMLSlotElement* {.importc.} = ref object of RootObj
+      name*: cstring
+    SlotOptions* = object of RootObj
+      flatten*: bool
+
+  const
+    fileReaderEmpty* = 0.FileReaderState
+    fileReaderLoading* = 1.FileReaderState
+    fileReaderDone* = 2.FileReaderState
+
+proc id*(n: Node): cstring {.importcpp: "#.id", nodecl.}
+proc `id=`*(n: Node; x: cstring) {.importcpp: "#.id = #", nodecl.}
+proc class*(n: Node): cstring {.importcpp: "#.className", nodecl.}
+proc `class=`*(n: Node; v: cstring) {.importcpp: "#.className = #", nodecl.}
+
+proc value*(n: Node): cstring {.importcpp: "#.value", nodecl.}
+proc `value=`*(n: Node; v: cstring) {.importcpp: "#.value = #", nodecl.}
+
+proc checked*(n: Node): bool {.importcpp: "#.checked", nodecl.}
+proc `checked=`*(n: Node; v: bool) {.importcpp: "#.checked = #", nodecl.}
+
+proc `disabled=`*(n: Node; v: bool) {.importcpp: "#.disabled = #", nodecl.}
+
+when defined(nodejs):
+  # we provide a dummy DOM for nodejs for testing purposes
+  proc len*(x: Node): int = x.childNodes.len
+  proc `[]`*(x: Node; idx: int): Element =
+    assert idx >= 0 and idx < x.childNodes.len
+    result = cast[Element](x.childNodes[idx])
+
+  var document* = Document(nodeType: DocumentNode)
+  document.ownerDocument = document
+
+  proc getElem(x: Element; id: cstring): Element =
+    if x.id == id: return x
+    for i in 0..<x.len:
+      result = getElem(x[i], id)
+      if result != nil: return result
+
+  proc getElementById*(doc: Document; id: cstring): Element =
+    getElem(doc.body, id)
+  proc getElementById*(id: cstring): Element = document.getElementById(id)
+
+  proc appendChild*(parent, n: Node) =
+    n.parentNode = parent
+    n.ownerDocument = parent.ownerDocument
+    parent.childNodes.add n
+
+  proc replaceChild*(parent, newNode, oldNode: Node) =
+    newNode.parentNode = parent
+    oldNode.parentNode = nil
+    var i = 0
+    while i < parent.len:
+      if Node(parent[i]) == oldNode:
+        parent.childNodes[i] = newNode
+        return
+      inc i
+    raiseAssert "old node not in node list"
+
+  proc removeChild*(parent, child: Node) =
+    child.parentNode = nil
+    var i = 0
+    while i < parent.len:
+      if Node(parent[i]) == child:
+        parent.childNodes.delete(i)
+        return
+      inc i
+    raiseAssert "old node not in node list"
+
+  proc insertBefore*(parent, newNode, before: Node) =
+    appendChild(parent, newNode)
+    var i = 0
+    while i < parent.len-1:
+      if Node(parent[i]) == before:
+        for j in countdown(parent.len-1, i-1):
+          parent.childNodes[j] = parent.childNodes[j-1]
+        parent.childNodes[i-1] = newNode
+        return
+      inc i
+    #raiseAssert "before not in node list"
+
+  proc createElement*(d: Document, identifier: cstring): Element =
+    new(result)
+    result.nodeName = identifier
+    result.nodeType = NodeType.ElementNode
+
+  proc createTextNode*(d: Document, identifier: cstring): Node =
+    new(result)
+    result.nodeName = "#text"
+    result.nodeValue = identifier
+    result.nodeType = NodeType.TextNode
+
+  proc createComment*(d: Document, data: cstring): Node =
+    new(result)
+    result.nodeName = "#comment"
+    result.nodeValue = data
+    result.nodeType = NodeType.CommentNode
+
+else:
+  proc len*(x: Node): int {.importcpp: "#.childNodes.length".}
+  proc `[]`*(x: Node; idx: int): Element {.importcpp: "#.childNodes[#]".}
+  proc getElementById*(id: cstring): Element {.importc: "document.getElementById", nodecl.}
+  proc appendChild*(n, child: Node) {.importcpp.}
+  proc removeChild*(n, child: Node) {.importcpp.}
+  proc remove*(child: Node) {.importcpp.}
+  proc replaceChild*(n, newNode, oldNode: Node) {.importcpp.}
+  proc insertBefore*(n, newNode, before: Node) {.importcpp.}
+  proc getElementById*(d: Document, id: cstring): Element {.importcpp.}
+  proc createElement*(d: Document, identifier: cstring): Element {.importcpp.}
+  proc createElementNS*(d: Document, namespaceURI, qualifiedIdentifier: cstring): Element {.importcpp.}
+  proc createTextNode*(d: Document, identifier: cstring): Node {.importcpp.}
+  proc createComment*(d: Document, data: cstring): Node {.importcpp.}
+
+proc setTimeout*(action: proc(); ms: int): TimeOut {.importc, nodecl.}
+proc clearTimeout*(t: TimeOut) {.importc, nodecl.}
+proc setInterval*(action: proc(); ms: int): Interval {.importc, nodecl.}
+proc clearInterval*(i: Interval) {.importc, nodecl.}
+
+{.push importcpp.}
+
+# EventTarget "methods"
+proc addEventListener*(et: EventTarget, ev: cstring, cb: proc(ev: Event), useCapture: bool = false)
+proc addEventListener*(et: EventTarget, ev: cstring, cb: proc(ev: Event), options: AddEventListenerOptions)
+proc dispatchEvent*(et: EventTarget, ev: Event)
+proc removeEventListener*(et: EventTarget; ev: cstring; cb: proc(ev: Event))
+
+# Window "methods"
+proc alert*(w: Window, msg: cstring)
+proc back*(w: Window)
+proc blur*(w: Window)
+proc clearInterval*(w: Window, interval: Interval)
+proc clearTimeout*(w: Window, timeout: TimeOut)
+proc close*(w: Window)
+proc confirm*(w: Window, msg: cstring): bool
+proc disableExternalCapture*(w: Window)
+proc enableExternalCapture*(w: Window)
+proc find*(w: Window, text: cstring, caseSensitive = false,
+           backwards = false): bool
+proc focus*(w: Window)
+proc forward*(w: Window)
+proc getComputedStyle*(w: Window, e: Node, pe: Node = nil): Style
+  ## .. warning:: The returned Style may or may not be read-only at run-time in the browser. getComputedStyle is performance costly.
+
+proc handleEvent*(w: Window, e: Event)
+proc home*(w: Window)
+proc moveBy*(w: Window, x, y: int)
+proc moveTo*(w: Window, x, y: int)
+proc open*(w: Window, uri, windowname: cstring,
+           properties: cstring = nil): Window
+proc print*(w: Window)
+proc prompt*(w: Window, text, default: cstring): cstring
+proc resizeBy*(w: Window, x, y: int)
+proc resizeTo*(w: Window, x, y: int)
+proc routeEvent*(w: Window, event: Event)
+proc scrollBy*(w: Window, x, y: int)
+proc scrollTo*(w: Window, x, y: int)
+proc setInterval*(w: Window, code: cstring, pause: int): Interval
+proc setInterval*(w: Window, function: proc (), pause: int): Interval
+proc setTimeout*(w: Window, code: cstring, pause: int): TimeOut
+proc setTimeout*(w: Window, function: proc (), pause: int): Interval
+proc stop*(w: Window)
+proc requestAnimationFrame*(w: Window, function: proc (time: float)): int
+proc cancelAnimationFrame*(w: Window, id: int)
+proc matchMedia*(w: Window, mediaQueryString: cstring): MediaQueryList
+
+# Node "methods"
+proc appendData*(n: Node, data: cstring)
+proc cloneNode*(n: Node, copyContent: bool): Node
+proc deleteData*(n: Node, start, len: int)
+proc focus*(e: Node)
+proc getAttribute*(n: Node, attr: cstring): cstring
+proc getAttributeNode*(n: Node, attr: cstring): Node
+proc hasAttribute*(n: Node, attr: cstring): bool
+proc hasChildNodes*(n: Node): bool
+proc normalize*(n: Node)
+proc insertData*(n: Node, position: int, data: cstring)
+proc removeAttribute*(n: Node, attr: cstring)
+proc removeAttributeNode*(n, attr: Node)
+proc replaceData*(n: Node, start, len: int, text: cstring)
+proc scrollIntoView*(n: Node)
+proc scrollIntoView*(n: Node, options: ScrollIntoViewOptions)
+proc setAttribute*(n: Node, name, value: cstring)
+proc setAttributeNode*(n: Node, attr: Node)
+proc querySelector*(n: Node, selectors: cstring): Element
+proc querySelectorAll*(n: Node, selectors: cstring): seq[Element]
+proc compareDocumentPosition*(n: Node, otherNode:Node): int
+proc lookupPrefix*(n: Node): cstring
+proc lookupNamespaceURI*(n: Node): cstring
+proc isDefaultNamespace*(n: Node): bool
+proc contains*(n: Node): bool
+proc isEqualNode*(n: Node): bool
+proc isSameNode*(n: Node): bool
+
+since (1, 3):
+  proc getRootNode*(n: Node,options: RootNodeOptions): Node
+
+  # DocumentOrShadowRoot
+  proc getSelection*(n: DocumentOrShadowRoot): Selection
+  proc elementFromPoint*(n: DocumentOrShadowRoot; x, y: float): Element
+
+  # shadow dom
+  proc attachShadow*(n: Element): ShadowRoot
+  proc assignedNodes*(n: HTMLSlotElement; options: SlotOptions): seq[Node]
+  proc assignedElements*(n: HTMLSlotElement; options: SlotOptions): seq[Element]
+
+# Document "methods"
+proc createAttribute*(d: Document, identifier: cstring): Node
+proc getElementsByName*(d: Document, name: cstring): seq[Element]
+proc getElementsByTagName*(d: Document, name: cstring): seq[Element]
+proc getElementsByClassName*(d: Document, name: cstring): seq[Element]
+proc insertNode*(range: Range, node: Node)
+proc getSelection*(d: Document): Selection
+proc handleEvent*(d: Document, event: Event)
+proc open*(d: Document)
+proc routeEvent*(d: Document, event: Event)
+proc write*(d: Document, text: cstring)
+proc writeln*(d: Document, text: cstring)
+proc querySelector*(d: Document, selectors: cstring): Element
+proc querySelectorAll*(d: Document, selectors: cstring): seq[Element]
+
+# Element "methods"
+proc blur*(e: Element)
+proc click*(e: Element)
+proc focus*(e: Element)
+proc handleEvent*(e: Element, event: Event)
+proc select*(e: Element)
+proc getElementsByTagName*(e: Element, name: cstring): seq[Element]
+proc getElementsByClassName*(e: Element, name: cstring): seq[Element]
+
+# FormElement "methods"
+proc reset*(f: FormElement)
+proc submit*(f: FormElement)
+proc checkValidity*(e: FormElement): bool
+proc reportValidity*(e: FormElement): bool
+
+# EmbedElement "methods"
+proc play*(e: EmbedElement)
+proc stop*(e: EmbedElement)
+
+# Location "methods"
+proc reload*(loc: Location)
+proc replace*(loc: Location, s: cstring)
+
+# History "methods"
+proc back*(h: History)
+proc forward*(h: History)
+proc go*(h: History, pagesToJump: int)
+proc pushState*[T](h: History, stateObject: T, title, url: cstring)
+
+# Navigator "methods"
+proc javaEnabled*(h: Navigator): bool
+since (1, 3):
+  proc canShare*(self: Navigator; data: cstring): bool           ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/canShare
+  proc sendBeacon*(self: Navigator; url, data: cstring): bool    ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/sendBeacon
+  proc vibrate*(self: Navigator; pattern: cint): bool            ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/vibrate
+  proc vibrate*(self: Navigator; pattern: openArray[cint]): bool ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/vibrate
+  proc registerProtocolHandler*(self: Navigator; scheme, url, title: cstring) ## https://developer.mozilla.org/en-US/docs/Web/API/Navigator/registerProtocolHandler
+
+# ClassList "methods"
+proc add*(c: ClassList, class: cstring)
+proc remove*(c: ClassList, class: cstring)
+proc contains*(c: ClassList, class: cstring): bool
+proc toggle*(c: ClassList, class: cstring)
+
+# Style "methods"
+proc getPropertyValue*(s: Style, property: cstring): cstring
+proc removeProperty*(s: Style, property: cstring)
+proc setProperty*(s: Style, property, value: cstring, priority = "")
+proc getPropertyPriority*(s: Style, property: cstring): cstring
+
+# Event "methods"
+proc preventDefault*(ev: Event)
+proc stopImmediatePropagation*(ev: Event)
+proc stopPropagation*(ev: Event)
+
+# KeyboardEvent "methods"
+proc getModifierState*(ev: KeyboardEvent, keyArg: cstring): bool
+
+# MouseEvent "methods"
+proc getModifierState*(ev: MouseEvent, keyArg: cstring): bool
+
+# TouchEvent "methods"
+proc identifiedTouch*(list: TouchList): Touch
+proc item*(list: TouchList, i: int): Touch
+
+# DataTransfer "methods"
+proc clearData*(dt: DataTransfer, format: cstring)
+proc getData*(dt: DataTransfer, format: cstring): cstring
+proc setData*(dt: DataTransfer, format: cstring, data: cstring)
+proc setDragImage*(dt: DataTransfer, img: Element, xOffset: int, yOffset: int)
+
+# DataTransferItem "methods"
+proc getAsFile*(dti: DataTransferItem): File
+
+# InputElement "methods"
+proc setSelectionRange*(e: InputElement, selectionStart: int, selectionEnd: int, selectionDirection: cstring = "none")
+proc setRangeText*(e: InputElement, replacement: cstring, startindex: int = 0, endindex: int = 0, selectionMode: cstring = "preserve")
+proc setCustomValidity*(e: InputElement, error: cstring)
+proc checkValidity*(e: InputElement): bool
+
+# Blob "methods"
+proc slice*(e: Blob, startindex: int = 0, endindex: int = e.size, contentType: cstring = "")
+
+# Performance "methods"
+proc now*(p: Performance): float
+
+# Selection "methods"
+proc removeAllRanges*(s: Selection)
+proc deleteFromDocument*(s: Selection)
+proc getRangeAt*(s: Selection, index: int): Range
+converter toString*(s: Selection): cstring
+proc `$`*(s: Selection): string = $(s.toString())
+
+# Storage "methods"
+proc getItem*(s: Storage, key: cstring): cstring
+proc setItem*(s: Storage, key, value: cstring)
+proc clear*(s: Storage)
+proc removeItem*(s: Storage, key: cstring)
+
+{.pop.}
+
+proc setAttr*(n: Node; key, val: cstring) {.importcpp: "#.setAttribute(@)".}
+
+var
+  window* {.importc, nodecl.}: Window
+  navigator* {.importc, nodecl.}: Navigator
+  screen* {.importc, nodecl.}: Screen
+
+when not defined(nodejs):
+  var document* {.importc, nodecl.}: Document
+
+proc decodeURI*(uri: cstring): cstring {.importc, nodecl.}
+proc encodeURI*(uri: cstring): cstring {.importc, nodecl.}
+
+proc escape*(uri: cstring): cstring {.importc, nodecl.}
+proc unescape*(uri: cstring): cstring {.importc, nodecl.}
+
+proc decodeURIComponent*(uri: cstring): cstring {.importc, nodecl.}
+proc encodeURIComponent*(uri: cstring): cstring {.importc, nodecl.}
+proc isFinite*(x: BiggestFloat): bool {.importc, nodecl.}
+proc isNaN*(x: BiggestFloat): bool {.importc, nodecl.}
+  ## see also `math.isNaN`.
+
+proc newEvent*(name: cstring): Event {.importcpp: "new Event(@)", constructor.}
+
+proc getElementsByClass*(n: Node; name: cstring): seq[Node] {.
+  importcpp: "#.getElementsByClassName(#)", nodecl.}
+
+
+type
+  BoundingRect* {.importc.} = object
+    top*, bottom*, left*, right*, x*, y*, width*, height*: float
+
+proc getBoundingClientRect*(e: Node): BoundingRect {.
+  importcpp: "getBoundingClientRect", nodecl.}
+proc clientHeight*(): int {.
+  importcpp: "(window.innerHeight || document.documentElement.clientHeight)@", nodecl.}
+proc clientWidth*(): int {.
+  importcpp: "(window.innerWidth || document.documentElement.clientWidth)@", nodecl.}
+
+proc inViewport*(el: Node): bool =
+  let rect = el.getBoundingClientRect()
+  result = rect.top >= 0 and rect.left >= 0 and
+           rect.bottom <= clientHeight().float and
+           rect.right <= clientWidth().float
+
+proc scrollTop*(e: Node): int {.importcpp: "#.scrollTop", nodecl.}
+proc `scrollTop=`*(e: Node, value: int) {.importcpp: "#.scrollTop = #", nodecl.}
+proc scrollLeft*(e: Node): int {.importcpp: "#.scrollLeft", nodecl.}
+proc scrollHeight*(e: Node): int {.importcpp: "#.scrollHeight", nodecl.}
+proc scrollWidth*(e: Node): int {.importcpp: "#.scrollWidth", nodecl.}
+proc offsetHeight*(e: Node): int {.importcpp: "#.offsetHeight", nodecl.}
+proc offsetWidth*(e: Node): int {.importcpp: "#.offsetWidth", nodecl.}
+proc offsetTop*(e: Node): int {.importcpp: "#.offsetTop", nodecl.}
+proc offsetLeft*(e: Node): int {.importcpp: "#.offsetLeft", nodecl.}
+
+since (1, 3):
+  func newDomParser*(): DomParser {.importcpp: "new DOMParser()".}
+    ## DOM Parser constructor.
+  func parseFromString*(this: DomParser; str: cstring; mimeType: cstring): Document {.importcpp.}
+    ## Parse from string to `Document`.
+
+  proc newDomException*(): DomException {.importcpp: "new DomException()", constructor.}
+    ## DOM Exception constructor
+  proc message*(ex: DomException): cstring {.importcpp: "#.message", nodecl.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/DOMException/message
+  proc name*(ex: DomException): cstring  {.importcpp: "#.name", nodecl.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/DOMException/name
+
+  proc newFileReader*(): FileReader {.importcpp: "new FileReader()", constructor.}
+    ## File Reader constructor
+  proc error*(f: FileReader): DomException {.importcpp: "#.error", nodecl.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader/error
+  proc readyState*(f: FileReader): FileReaderState {.importcpp: "#.readyState", nodecl.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readyState
+  proc resultAsString*(f: FileReader): cstring {.importcpp: "#.result", nodecl.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader/result
+  proc abort*(f: FileReader) {.importcpp: "#.abort()".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader/abort
+  proc readAsBinaryString*(f: FileReader, b: Blob) {.importcpp: "#.readAsBinaryString(#)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsBinaryString
+  proc readAsDataURL*(f: FileReader, b: Blob) {.importcpp: "#.readAsDataURL(#)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDataURL
+  proc readAsText*(f: FileReader, b: Blob|File, encoding = cstring"UTF-8") {.importcpp: "#.readAsText(#, #)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsText
+
+since (1, 5):
+  proc elementsFromPoint*(n: DocumentOrShadowRoot; x, y: float): seq[Element] {.importcpp.}
+
+
+since (1, 7):
+
+  proc insertAdjacentText*(self: Node; position, data: cstring) {.importjs: "#.$1(#, #)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/insertAdjacentText
+
+  proc insertAdjacentElement*(self: Node; position: cstring; element: Node) {.importjs: "#.$1(#, #)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/insertAdjacentElement
+
+  proc insertAdjacentHTML*(self: Node; position, html: cstring) {.importjs: "#.$1(#, #)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/insertAdjacentHTML
+
+  proc after*(self: Node; element: Node): Node {.importjs: "#.$1(@)", varargs.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/after
+
+  proc before*(self: Node; element: Node): Node {.importjs: "#.$1(@)", varargs.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/before
+
+  proc append*(self: Node; element: Node): Node {.importjs: "#.$1(@)", varargs.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/append
+
+  proc closest*(self: Node; cssSelector: cstring): Node {.importjs: "#.$1(#)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/closest
+
+  proc hasAttributeNS*(self: Node; namespace, localName: cstring): bool {.importjs: "(#.$1(#, #) || false)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/hasAttributeNS
+
+  proc removeAttributeNS*(self: Node; namespace, attributeName: cstring) {.importjs: "#.$1(#, #)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttributeNS
+
+  proc hasPointerCapture*(self: Node; pointerId: SomeNumber): bool {.importjs: "(#.$1(#) || false)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/hasPointerCapture
+
+  proc releasePointerCapture*(self: Node; pointerId: SomeNumber) {.importjs: "#.$1(#)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/releasePointerCapture
+
+  proc requestPointerLock*(self: Node) {.importjs: "#.$1()".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/requestPointerLock
+
+  proc replaceChildren*(self: Node; replacements: Node) {.importjs: "#.$1(@)", varargs.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/replaceChildren
+
+  proc replaceWith*(self: Node; replacements: Node) {.importjs: "#.$1(@)", varargs.}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/replaceWith
+
+  proc scrollIntoViewIfNeeded*(self: Node; centerIfNeeded: bool) {.importjs: "#.$1(#)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoViewIfNeeded
+
+  proc setHTML*(self: Node; html: cstring) {.importjs: "#.$1(#)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/setHTML
+
+  proc toggleAttribute*(self: Node; name: cstring; force = false): bool {.importjs: "(#.$1(#, #) || false)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/toggleAttribute
+
+  proc matches*(self: Node; cssSelector: cstring): bool {.importjs: "(#.$1(#) || false)".}
+    ## https://developer.mozilla.org/en-US/docs/Web/API/Element/matches
+
+
+since (2, 1):
+  type VisualViewport* {.importc.} = ref object of EventTarget
+    offsetLeft*, offsetTop*, pageLeft*, pageTop*, width*, height*, scale*: float
+    onResize*, onScroll*: proc (event: Event) {.closure.}
+
+  func visualViewport*(self: Window): VisualViewport {.importjs: "#.$1", nodecl.}