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parent
85e4dd7370
commit
3b2fe3cd33
4 changed files with 24 additions and 1 deletions
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@ -40,6 +40,9 @@ Note that this is meant for small data sets, e.g. config settings. For larger da
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minify [bool]
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: Let `js.Build` handle the minification.
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avoidTDZ {{< new-in "0.78.0" >}}
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: There is/was a bug in WebKit with severe performance issue with the tracking of TDZ checks in JavaScriptCore. Enabling this flag removes the TDZ and `const` assignment checks and may improve performance of larger JS codebases until the WebKit fix is in widespread use. See https://bugs.webkit.org/show_bug.cgi?id=199866
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target [string]
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: The language target.
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One of: `es5`, `es2015`, `es2016`, `es2017`, `es2018`, `es2019`, `es2020` or `esnext`.
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2
go.sum
2
go.sum
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@ -459,6 +459,8 @@ github.com/spf13/afero v1.2.2 h1:5jhuqJyZCZf2JRofRvN/nIFgIWNzPa3/Vz8mYylgbWc=
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github.com/spf13/afero v1.2.2/go.mod h1:9ZxEEn6pIJ8Rxe320qSDBk6AsU0r9pR7Q4OcevTdifk=
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github.com/spf13/afero v1.4.0 h1:jsLTaI1zwYO3vjrzHalkVcIHXTNmdQFepW4OI8H3+x8=
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github.com/spf13/afero v1.4.0/go.mod h1:Ai8FlHk4v/PARR026UzYexafAt9roJ7LcLMAmO6Z93I=
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github.com/spf13/afero v1.4.1 h1:asw9sl74539yqavKaglDM5hFpdJVK0Y5Dr/JOgQ89nQ=
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github.com/spf13/afero v1.4.1/go.mod h1:Ai8FlHk4v/PARR026UzYexafAt9roJ7LcLMAmO6Z93I=
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github.com/spf13/cast v1.3.0 h1:oget//CVOEoFewqQxwr0Ej5yjygnqGkvggSE/gB35Q8=
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github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
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github.com/spf13/cast v1.3.1 h1:nFm6S0SMdyzrzcmThSipiEubIDy8WEXKNZ0UOgiRpng=
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@ -70,6 +70,16 @@ type Options struct {
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// What to use instead of React.Fragment.
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JSXFragment string
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// There is/was a bug in WebKit with severe performance issue with the tracking
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// of TDZ checks in JavaScriptCore.
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//
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// Enabling this flag removes the TDZ and `const` assignment checks and
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// may improve performance of larger JS codebases until the WebKit fix
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// is in widespread use.
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//
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// See https://bugs.webkit.org/show_bug.cgi?id=199866
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AvoidTDZ bool
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mediaType media.Type
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outDir string
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contents string
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@ -339,6 +349,8 @@ func toBuildOptions(opts Options) (buildOptions api.BuildOptions, err error) {
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JSXFactory: opts.JSXFactory,
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JSXFragment: opts.JSXFragment,
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AvoidTDZ: opts.AvoidTDZ,
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Tsconfig: opts.tsConfig,
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Stdin: &api.StdinOptions{
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@ -54,7 +54,12 @@ func TestToBuildOptions(t *testing.T) {
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})
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opts, err = toBuildOptions(Options{
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Target: "es2018", Format: "cjs", Minify: true, mediaType: media.JavascriptType})
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Target: "es2018",
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Format: "cjs",
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Minify: true,
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mediaType: media.JavascriptType,
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AvoidTDZ: true,
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})
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c.Assert(err, qt.IsNil)
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c.Assert(opts, qt.DeepEquals, api.BuildOptions{
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Bundle: true,
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@ -63,6 +68,7 @@ func TestToBuildOptions(t *testing.T) {
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MinifyIdentifiers: true,
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MinifySyntax: true,
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MinifyWhitespace: true,
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AvoidTDZ: true,
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Stdin: &api.StdinOptions{
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Loader: api.LoaderJS,
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},
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