The add()
method appends a new object to the end of a WeakSet
object.
ws.add(value);
WeakSet
collection.The WeakSet
object.
var ws = new WeakSet(); ws.add(window); // add the window object to the WeakSet ws.has(window); // true // Weakset only takes objects as arguments ws.add(1); // results in "TypeError: Invalid value used in weak set" in Chrome // and "TypeError: 1 is not a non-null object" in Firefox
Desktop | ||||||
---|---|---|---|---|---|---|
add |
36 | 12 | 34 | No | 23 | 9 |
Mobile | ||||||
---|---|---|---|---|---|---|
add |
37 | 36 | 34 | 24 | 9 | 3.0 |
Server | |
---|---|
add |
0.12 |
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https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet/add