#output.polyfill

• Type: 'entry' | 'usage' | 'off'
• Default: 'off'

Control the polyfill injection mode.

Please refer to the Polyfill Mode for more details.

#Optional value

#usage

When output.polyfill is set to 'usage', Rsbuild injects polyfills based on the APIs used in each file. This provides optimal bundle size as only needed polyfills are included.

export default {
  output: {
    polyfill: 'usage',
  },
};

#entry

When output.polyfill is set to 'entry', Rsbuild injects polyfills in each entry file. This ensures all polyfills are available but may increase bundle size.

export default {
  output: {
    polyfill: 'entry',
  },
};

#off

When output.polyfill is configured as 'off', Rsbuild will not inject the polyfills, and developers need to ensure code compatibility themselves.

export default {
  output: {
    polyfill: 'off',
  },
};