JavaScript: Map.prototype.clear

By Xah Lee. Date: . Last updated: .

New in ES2015.

Map.prototype.clear()

Deletes all entries of the map.

Returns undefined.

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

// clear map
console.log(
    m.clear()
); // Returns undefined

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

Reference

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

Map Topic

  1. JavaScript: the Map Object Tutorial
  2. JavaScript: Map Object
  3. JavaScript: Map.prototype
  4. JavaScript: Iterate Over Map Object
  5. JavaScript: Convert Object to/from Map
Like what you read? Buy JavaScript in Depth
or, buy a new keyboard, see Keyboard Reviews.