Parameters: It accepts a parameter ‘key’ which is the key of the element which is going to be tested for presence in the object weakmap.
Return values: It returns true if the element with the specified key is present in the weakmap object otherwise it returns false.
Below are examples of weakMap.has() method.
Example 1: Below is a basic example of weakmap.has() method that returns true.
Example 2: Here output is false because the key “key1” has not been set at the end of the weakMap object.
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- Edge 12 and above
- Firefox 6 and above
- Internet Explorer 11 and above
- Opera 23 and above
- Safari 8 and above
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