@wordpress/data/build-module/utils/emitter.mjs.map

Data module for WordPress.

{
  "version": 3,
  "sources": ["../../src/utils/emitter.ts"],
  "sourcesContent": ["export interface DataEmitter {\n\temit: VoidFunction;\n\tsubscribe: ( listener: VoidFunction ) => VoidFunction;\n\tpause: VoidFunction;\n\tresume: VoidFunction;\n\tisPaused: boolean;\n}\n\n/**\n * Create an event emitter.\n *\n * @return The event emitter.\n */\nexport function createEmitter(): DataEmitter {\n\tlet isPaused = false;\n\tlet isPending = false;\n\tconst listeners = new Set< VoidFunction >();\n\tconst notifyListeners = () =>\n\t\t// We use Array.from to clone the listeners Set\n\t\t// This ensures that we don't run a listener\n\t\t// that was added as a response to another listener.\n\t\tArray.from( listeners ).forEach( ( listener ) => listener() );\n\n\treturn {\n\t\tget isPaused() {\n\t\t\treturn isPaused;\n\t\t},\n\n\t\tsubscribe( listener ) {\n\t\t\tlisteners.add( listener );\n\t\t\treturn () => listeners.delete( listener );\n\t\t},\n\n\t\tpause() {\n\t\t\tisPaused = true;\n\t\t},\n\n\t\tresume() {\n\t\t\tisPaused = false;\n\t\t\tif ( isPending ) {\n\t\t\t\tisPending = false;\n\t\t\t\tnotifyListeners();\n\t\t\t}\n\t\t},\n\n\t\temit() {\n\t\t\tif ( isPaused ) {\n\t\t\t\tisPending = true;\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tnotifyListeners();\n\t\t},\n\t};\n}\n"],
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