docs(guides/tree-shaking): document #__NO_SIDE_EFFECTS__ annotation#8238
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Webpack 5.107 supports the #__NO_SIDE_EFFECTS__ annotation from the compiler-notations-spec, letting authors mark function declarations as side-effect-free so calls can be tree-shaken when their return value is unused. Adds a new subsection in the tree shaking guide right after the existing /*#__PURE__*/ section, with the caveat that propagation is currently intra-module only. Refs: webpack/webpack#20775
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alexander-akait
approved these changes
May 18, 2026
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Summary
Webpack 5.107 supports the
#__NO_SIDE_EFFECTS__annotation from the compiler-notations-spec, letting authors mark function declarations as side-effect-free so calls can be tree-shaken when their return value is unused.Adds a new subsection in
guides/tree-shakingright after the existing/*#__PURE__*/section, with the caveat that propagation is currently intra-module only (cross-module propagation is planned for a future release).Refs: webpack/webpack#20775
Test plan