The set()
method adds a new element with a specified key
and value to a WeakMap
object.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
The source for this interactive example is stored in a GitHub
repository. If you'd like to contribute to the interactive examples project, please
clone https://github.com/mdn/interactive-examples
and send us a pull request.
Syntax
wm.set(key, value);
Parameters
key
- Required. Must be
object
. The key of the element to add to theWeakMap
object. value
- Required. Any value. The value of the element to add to the
WeakMap
object.
Return value
The WeakMap
object.
Examples
Using the set() method
var wm = new WeakMap();
var obj = {};
// Add new elements to the WeakMap
wm.set(obj, 'foo').set(window, 'bar'); // chainable
// Update an element in the WeakMap
wm.set(obj, 'baz');
Specifications
Browser compatibility
BCD tables only load in the browser