JavaScript Symbol keyFor() Method

The Symbol.keyFor() is an inbuilt method in JavaScript that is used to retrieve the key which has been shared with the given symbols and this key is retrieved from the global symbol registry.

Syntax:

Symbol.keyFor(sym);

Here "Symbol" is the symbol that is to be searched into the runtime-wide symbol registry.

Parameters: This method accepts a parameter "sym" which is the symbol for which the key is to be found.

Return value: This method returns a string representing the key for the given symbol found in the global registry otherwise it returns undefined. JavaScript code to show the working of this method.

Example 1: In this example, we will use Symbol keyFor() Method.

Geeks
123
gfg
789

Example 2: In this example, we will use Symbol keyFor() Method.

undefined
undefined

Supported Browsers:

• Google Chrome 40 and above
• Edge 12 and above
• Firefox 36 and above
• Opera 27 and above
• Safari 9 and above

Reference: https://devdocs.io/javascript/global_objects/symbol/keyfor