541 B
541 B
title |
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Map |
Map
A map of [key, value]
entries, where keys and values can be any value (both objects and primitive values).
Syntax
new Map([iterable])
Parameters
iterable An Array or other iterable object whose elements are key-value pairs.
Example
// basic usage
const myMap = new Map();
myMap.set('foo',1);
myMap.set('bar',2);
myMap.set('baz',3);
myMap.get('foo'); // returns 1
myMap.get('baz'); // returns 3
myMap.get('hihi'); // return undefined
myMap.size(); // 3