Packager

A plugin type: Turn a group of assets into a bundle file

Packagers determine how to merge different asset types into a single bundle.

import { Packager } from "@parcel/plugin";

export default new Packager({
  async package({ bundle }) {
    // ...
    return { contents, map };
  },
});

Relevant API

SymbolResolution parcel/packages/core/types/index.js:1169

Specifies a symbol in an asset

type SymbolResolution = {|
  +asset: Asset,

The Asset which exports the symbol.

  +exportSymbol: Symbol | string,

under which name the symbol is exported

  +symbol: void | null | false | Symbol,

The identifier under which the symbol can be referenced.

  +loc: ?SourceLocation,

The location of the specifier that lead to this result.

|}
Referenced by:
BundleGraph, ExportSymbolResolution

ExportSymbolResolution parcel/packages/core/types/index.js:1183 

type ExportSymbolResolution = {|
  ...SymbolResolution,
  +exportAs: Symbol | string,
|}
Referenced by:
BundleGraph

Packager parcel/packages/core/types/index.js:1549 

type Packager<ConfigType> = {|
  loadConfig?: ({|
    config: Config,
    options: PluginOptions,
    logger: PluginLogger,
  |}) => Promise<ConfigType> | ConfigType,
  package({|
    bundle: NamedBundle,
    bundleGraph: BundleGraph<NamedBundle>,
    options: PluginOptions,
    logger: PluginLogger,
    config: ConfigType,
    getInlineBundleContents: (Bundle, BundleGraph<NamedBundle>) => Async<{|
      contents: Blob
    |}>,
    getSourceMapReference: (map: ?SourceMap) => Async<?string>,
  |}): Async<BundleResult>,
|}