How to build tree-shakeable JavaScript libraries

Here's a neutral and interesting summary of the text in one paragraph: Tree-shaking is the removal of unused code from JavaScript bundles, but not all code that looks unused is tree-shakeable. This concept is relevant when using ES6 imports/exports with JavaScript bundlers, as it allows for static analysis of used and unused exports. Tree-shakable design refers to writing code in a way that minimizes the amount of code included in bundles, making it smaller and more efficient. To achieve this, developers should follow best practices such as marking pure functions with /* #__PURE__ */ comments, using the sideEffects property in package.json files, and designing libraries with caution to avoid side effects. By doing so, developers can take advantage of tree-shaking and dead code elimination features in bundlers like Webpack and Rollup.

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