Runtime

A plugin type: Programatically insert assets out of thin air into bundles

The Runtime API is experimental and therefore subject to change, even between minor updates.

Runtimes accept a bundle and return assets to be inserted into that bundle.

import { Runtime } from "@parcel/runtime";

export default new Runtime({
  async apply({ bundle, bundleGraph }) {
    // ...
    return assets;
  },
});

Relevant API

RuntimeAsset parcel/packages/core/types/index.js:1520

A "synthetic" asset that will be inserted into the bundle graph.

type RuntimeAsset = {|
  +filePath: FilePath,
  +code: string,
  +dependency?: Dependency,
  +isEntry?: boolean,
  +env?: EnvironmentOptions,
|}
Referenced by:
Runtime

Runtime parcel/packages/core/types/index.js:1531 

type Runtime<ConfigType> = {|
  loadConfig?: ({|
    config: Config,
    options: PluginOptions,
    logger: PluginLogger,
  |}) => Promise<ConfigType> | ConfigType,
  apply({|
    bundle: NamedBundle,
    bundleGraph: BundleGraph<NamedBundle>,
    config: ConfigType,
    options: PluginOptions,
    logger: PluginLogger,
  |}): Async<void | RuntimeAsset | Array<RuntimeAsset>>,
|}