fix: honor --use-strict for CommonJS scripts - #65248
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Coverage 90.31% 90.31%
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aduh95
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Aug 12, 2026
…ripts `node --use-strict script.js` did not apply strict mode to CommonJS scripts. Parser::ParseWrapped(), used to parse the function V8 synthesizes for CommonJS module wrapping, hardcoded LanguageMode::kSloppy instead of consulting the language mode already configured on the ParseInfo. As a result the `--use-strict` CLI flag had no effect on ordinary script execution, even though it worked correctly from the REPL. Pass `info->language_mode()` through to ParseFunctionLiteral() so the wrapped function honors the language mode Node.js configured for the parse, matching V8's behavior for other entry points. Add regression coverage in test/parallel/test-cli-eval.js that runs a script assigning to an undeclared variable with and without `--use-strict`, asserting the ReferenceError is only thrown in the latter case. Fixes: nodejs#30039 Signed-off-by: Som Samantray <92726151+SomSamantray@users.noreply.github.com>
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Issue
node --use-strict script.jsdid not apply strict mode to CommonJS scripts.Fix
Pass the configured language mode to V8 when parsing wrapped CommonJS functions, and add regression coverage for the CLI behavior.