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

JS Map Topic

  1. the Map Object Tutorial
  2. Map Object
  3. Map.prototype
  4. Iterate Over Map Object
  5. Convert Object to/from Map
  6. Map Filter
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