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| -rw-r--r-- | changelog.md | 8 | ||||
| -rw-r--r-- | lib/system/jssys.nim | 6 |
2 files changed, 10 insertions, 4 deletions
diff --git a/changelog.md b/changelog.md index b645bc5c7..f7f92ad3c 100644 --- a/changelog.md +++ b/changelog.md @@ -3,7 +3,13 @@ ## Changes affecting backward compatibility - +- The `Math.trunc` polyfill for targeting Internet Explorer was + previously emitted for every JavaScript output file except if + the symbol `nodejs` was defined via `-d:nodejs`. Now, it is only + emitted if the symbol `nimJsMathTruncPolyfill` is defined. If you are + targeting Internet Explorer, you may choose to enable this option + or define your own `Math.trunc` polyfill using the [`emit` pragma](https://nim-lang.org/docs/manual.html#implementation-specific-pragmas-emit-pragma). Nim uses + `Math.trunc` for the division and modulo operators for integers. ## Standard library additions and changes diff --git a/lib/system/jssys.nim b/lib/system/jssys.nim index cd4f378be..250bd069d 100644 --- a/lib/system/jssys.nim +++ b/lib/system/jssys.nim @@ -763,7 +763,8 @@ proc nimParseBiggestFloat(s: string, number: var BiggestFloat, start: int): int # Workaround for IE, IE up to version 11 lacks 'Math.trunc'. We produce # 'Math.trunc' for Nim's ``div`` and ``mod`` operators: -const jsMathTrunc = """ +when defined(nimJsMathTruncPolyfill): + {.emit: """ if (!Math.trunc) { Math.trunc = function(v) { v = +v; @@ -771,5 +772,4 @@ if (!Math.trunc) { return (v - v % 1) || (v < 0 ? -0 : v === 0 ? v : 0); }; } -""" -when not defined(nodejs): {.emit: jsMathTrunc .} +""".} |