JavaScript WeakSet
JavaScript WeakSet is used to store a collection of objects. It adapts the same properties of that of a set i.e. does not store duplicates. The major difference of a WeakSet with a set is that a WeakSet is a collection of objects and not values of some particular type.
Syntax:
new WeakSet(object)
Parameters: Here parameter “object” is an iterable object. All the elements of the iterable object are added to the WeakSet.
Return type: It returns a weakset object.
Example 1: In this example, we will create a weakSet object and add an element to it, then we will check if the element exists in the weakSet. We will use has() method and add() method
javascript
function gfg() { let weakSetObject = new WeakSet(); let objectOne = {}; // add(value) weakSetObject.add(objectOne); console.log("objectOne added"); // has(value) console.log("WeakSet has objectOne : " + weakSetObject.has(objectOne));}gfg(); |
Output:
objectOne added true
Example 2: In this example, we will see the working of weakSet functions also we will delete data using the delete() method.
javascript
let weakSetObject = new WeakSet();let objectOne = {};let objectTwo = {};// add(value)weakSetObject.add(objectOne);console.log("objectOne added");weakSetObject.add(objectTwo);console.log("objectTwo added");// has(value)console.log("WeakSet has objectTwo : " +weakSetObject.has(objectTwo));// delete(value)weakSetObject.delete(objectTwo);console.log("objectTwo deleted");console.log("WeakSet has objectTwo : " +weakSetObject.has(objectTwo)); |
Output:
objectOne added objectTwo added WeakSet has objectTwo : true objectTwo deleted WeakSet has objectTwo : false
Supported Browsers:
- Google Chrome
- Internet Explorer
- Firefox
- Apple Safari
- Opera
We have a complete list of Javascript weakSet methods, to check those please go through this JavaScript WeakSet Reference article.
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