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v0.18.6

release notes

Published 6/20/2023

PatchContains breaking changes

Release notes

Fix tree-shaking of classes with decorators (#3164)

This release fixes a bug where esbuild incorrectly allowed tree-shaking on classes with decorators. Each decorator is a function call, so classes with decorators must never be tree-shaken. This bug was a regression that was unintentionally introduced in version 0.18.2 by the change that enabled tree-shaking of lowered private fields. Previously decorators were always lowered, and esbuild always considered the automatically-generated decorator code to be a side effect. But this is no longer the case now that esbuild analyzes side effects using the AST before lowering takes place. This bug was fixed by considering any decorator a side effect.
Fix a minification bug involving function expressions (#3125)

When minification is enabled, esbuild does limited inlining of const symbols at the top of a scope. This release fixes a bug where inlineable symbols were incorrectly removed assuming that they were inlined. They may not be inlined in cases where they were referenced by earlier constants in the body of a function expression. The declarations involved in these edge cases are now kept instead of being removed:
// Original code { const fn = () => foo const foo = 123 console.log(fn) } // Old output (with --minify-syntax) console.log((() => foo)()); // New output (with --minify-syntax) { const fn = () => foo, foo = 123; console.log(fn); }

release notes

Published 6/20/2023

PatchContains breaking changes

Release notes

Fix tree-shaking of classes with decorators (#3164)

This release fixes a bug where esbuild incorrectly allowed tree-shaking on classes with decorators. Each decorator is a function call, so classes with decorators must never be tree-shaken. This bug was a regression that was unintentionally introduced in version 0.18.2 by the change that enabled tree-shaking of lowered private fields. Previously decorators were always lowered, and esbuild always considered the automatically-generated decorator code to be a side effect. But this is no longer the case now that esbuild analyzes side effects using the AST before lowering takes place. This bug was fixed by considering any decorator a side effect.
Fix a minification bug involving function expressions (#3125)

When minification is enabled, esbuild does limited inlining of const symbols at the top of a scope. This release fixes a bug where inlineable symbols were incorrectly removed assuming that they were inlined. They may not be inlined in cases where they were referenced by earlier constants in the body of a function expression. The declarations involved in these edge cases are now kept instead of being removed:
// Original code { const fn = () => foo const foo = 123 console.log(fn) } // Old output (with --minify-syntax) console.log((() => foo)()); // New output (with --minify-syntax) { const fn = () => foo, foo = 123; console.log(fn); }

release notes

Published 6/20/2023

PatchContains breaking changes

Release notes

Fix tree-shaking of classes with decorators (#3164)

This release fixes a bug where esbuild incorrectly allowed tree-shaking on classes with decorators. Each decorator is a function call, so classes with decorators must never be tree-shaken. This bug was a regression that was unintentionally introduced in version 0.18.2 by the change that enabled tree-shaking of lowered private fields. Previously decorators were always lowered, and esbuild always considered the automatically-generated decorator code to be a side effect. But this is no longer the case now that esbuild analyzes side effects using the AST before lowering takes place. This bug was fixed by considering any decorator a side effect.
Fix a minification bug involving function expressions (#3125)

When minification is enabled, esbuild does limited inlining of const symbols at the top of a scope. This release fixes a bug where inlineable symbols were incorrectly removed assuming that they were inlined. They may not be inlined in cases where they were referenced by earlier constants in the body of a function expression. The declarations involved in these edge cases are now kept instead of being removed:
// Original code { const fn = () => foo const foo = 123 console.log(fn) } // Old output (with --minify-syntax) console.log((() => foo)()); // New output (with --minify-syntax) { const fn = () => foo, foo = 123; console.log(fn); }