add allowJs default value description #62611
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jakebailey
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Oct 20, 2025
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Issue #62644
This PR adds a
defaultValueDescriptionto theallowJscompiler option to document its conditional default introduced in TS 4.1, wherecheckJsimpliesallowJs.I've seen some confusion around this, most recently in
@tsconfig/strictest, where they setcheckJs: trueandallowJs: undefinedwith the intention of not allowing js unless explicitly set by extending configs (tsconfig/bases#88).