• Rollup Plugin Name: @rollup/plugin-replace
• Rollup Plugin Version: 5.0.5

Documentation Is:

• Missing
• Needed
• Confusing
• Not Sure?

Please Explain in Detail...

Although the option sourceMap exists within the codebase it's not documented likely for historical reasons as it wasn't documented either on the archive plugin rollup-plugin-replace

Your Proposal for Changes

Add a new entry to the root README.md as follows

sourceMap

Type: Boolean

Default: false

Enables generating sourcemaps for the bundled code. For example, where the plugin is called as follows:

replace({
  sourcemap: true
});