What Are the Benefits of the New Tree Shaking Algorithm in Rspack v0.6?

Rspack has announced its version 0.6 update, which brings substantial changes aimed at enhancing its functionality and compatibility.

This version introduces significant improvements in the CSS handling mechanism, making it a more robust solution for developers dealing with CSS in their projects.

One of the major updates is the introduction of the rspack.CssExtractRspackPlugin, a replacement for the mini-css-extract-plugin.

This new plugin allows for more customized CSS module names and supports loaders that depend on the output of css-loader, while still allowing CSS to be extracted into a separate file.

The new tree shaking algorithm, which has been stabilized and enabled by default in version 0.6, addresses previous limitations such as handling circular references and providing better optimization information for further build stages. This algorithm aims to improve the efficiency of removing unused code and optimizing the remaining code.

Another key change is the modification of CSS module handling.

The new version introduces three types of module configurations (css/auto, css, and css/module) which only take effect when experiments.css is enabled.

These changes include the use of default exports, named exports, and namespace exports together, improving the flexibility and future compatibility with native CSS modules.

In terms of development and production modes, there have been changes to the default values for various configurations, aimed at improving compatibility and performance.

For instance, the localIdentName configuration has been updated to enhance gzip compression size.

Rspack v0.6 represents a significant step forward in the development of this powerful tool, especially for those handling complex CSS configurations and optimizations.

The enhancements in tree shaking and CSS module management are particularly notable, offering developers greater control and efficiency.

Users of older versions, especially those relying heavily on CSS, should consider upgrading to take full advantage of these new features.

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