JS: Map.prototype.get

By Xah Lee. Date: . Last updated: .

New in ES2015.

map_obj.get(key)

Return the value of the key key in map map_obj.

If key isn't found, return undefined.

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

// get the value of a key
console.log(m.get (5)); // "n5"

console.log(m.get (99)); // undefined

Reference

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

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
Liket it? Put $5 at patreon.

Or, Buy JavaScript in Depth

If you have a question, put $5 at patreon and message me.

Web Dev Tutorials

  1. HTML
  2. Visual CSS
  3. JS in Depth
  4. JS Reference
  5. DOM
  6. SVG
  7. Web Dev Blog