JS: Map.prototype.clear

By Xah Lee. Date: . Last updated: .

New in ES2015.

map_obj.clear()

Deletes all entries of the map map_obj.

Return undefined.

const m = new Map([[3, "n3"], [4, "n4"], [5, "n5"] ]);

// clear map, return undefined
console.log( m.clear() === undefined ); // true

// cleared
console.log(m); // Map {}

Reference

ECMAScript 2015 §Keyed Collection#sec-map.prototype.clear

Map Topic

  1. JS: the Map Object Tutorial
  2. JS: Map Object
  3. JS: Map.prototype
  4. JS: Iterate Over Map Object
  5. JS: Convert Object to/from Map
Liket it? Put $5 at patreon.

Or, Buy JavaScript in Depth