The set()
method of Map
instances adds or updates an entry in this map with a specified key and a value.
The set()
method of Map
instances adds or updates an entry in this map with a specified key and a value.
set(key, value)
key
The key of the element to add to the Map
object. The key may be any JavaScript type (any primitive value or any type of JavaScript object).
value
The value of the element to add to the Map
object. The value may be any JavaScript type (any primitive value or any type of JavaScript object).
The Map
object.
const myMap = new Map(); // Add new elements to the map myMap.set("bar", "foo"); myMap.set(1, "foobar"); // Update an element in the map myMap.set("bar", "baz");
Since the set()
method returns back the same Map
object, you can chain the method call like below:
// Add new elements to the map with chaining. myMap.set("bar", "foo").set(1, "foobar").set(2, "baz");
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
set |
38 | 12 | 13 | 25 | 8 | 38 | 14 | 25 | 8 | 3.0 | 38 | 1.0 | 0.12.0 |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/set