gem-hunter

rollup-plugin-conditional

Why

But do I really need it?

export default {
  ...
  plugins: [
    ...isProduction ? [
      licence(),
      strip(),
      uglify(),
      gzip()
    ] : []
  ]
};

Installation

npm install rollup-plugin-conditional --save-dev

Usage

import conditional from "rollup-plugin-conditional";
// import other plugins

const isProduction = process.env.buildTarget === "PROD";

export default {
  ...
  plugins: [
    ...
    conditional(isProduction, [
      licence(),
      strip(),
      uglify(),
      gzip()
    ]),

    conditional(!isProduction, [
      filesize()
    ])
  ]
})

export default {
  ...
  plugins: [
    conditional(!isProduction, [
      conditional(isLocalBuild, [
        eslint()
      ]),
      watch()
    ])
  ]
};

Special cases

import serve from "rollup-plugin-serve";

export default {
  ...
  plugins: [
    conditional(false, [ // false here will prevent any of the plugins' life cycle hooks from being executed
      // rollup-plugin-serve will however instantiate a http(s)-server immediately and outside any of the life cycle hooks
      // resulting in the http-server running even though we don't want it to.
      serve()
    ])
  ]
};

import serve from "rollup-plugin-serve";

export default {
  ...
  plugins: [
    conditional(false, () => [ // Notice the arrow function.
      serve()
    ])
  ]
};

Backwards Compatibility Table

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