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Enable mini-css-extract-plugin's esModule mode #1511

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edmorley opened this issue Dec 22, 2019 · 1 comment · Fixed by #1514

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feature performance

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edmorley commented Dec 22, 2019

mini-css-extract-plugin v0.9.0 added an esModule option that makes the plugin output JS using ES modules instead of CJS syntax:
webpack-contrib/mini-css-extract-plugin#475
https://github.com/webpack-contrib/mini-css-extract-plugin#esmodule

This allows webpack's module concatenation and tree shaking to work more effectively.

Since webpack 4 supports ESM (and iirc will never output ESM itself) this seems like something we can enable without it being a breaking change.

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edmorley commented Dec 28, 2019 •

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I've filed webpack-contrib/mini-css-extract-plugin/issues/485 for enabling the feature by default upstream.

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style: Enable mini-css-extract-plugin's esModule mode #1514

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edmorley closed this as completed in #1514

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          style: Enable mini-css-extract-plugin's esModule mode (#1514)

01f2727

This makes the loader part of `mini-css-extract-plugin` output JS using
ES modules syntax instead of CJS, allowing webpack's module concatenation
and tree shaking features to work more effectively:
https://github.com/webpack-contrib/mini-css-extract-plugin#esmodule

Fixes #1511.

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