JavaScript Symbol match Property

Last Updated : 19 May, 2023

JavaScript Symbol match property is used to identify the matching of a regular expression against a string and this function is called using String match() method.

Syntax:

regexp[Symbol.match] = false;

Parameters: It does not accept any parameters.

Return value: It will return the Boolean value for a string matching if matches found then it will return true otherwise returns false. Below examples illustrate the Symbol.match property in JavaScript.

Below examples illustrate the JavaScript Symbol match Property:

Example 1: In this example, we will check if a string starts with a particular expression defined in regexp

javascript

const regexp1 = /geeksforgeeks/; 
  
regexp1[Symbol.match] = false; 
  
console.log('/geeks/'.startsWith(regexp1)); 
console.log('/geeksforgeeks/'.endsWith(regexp1));

Output:

false
true

Example 2: In this example, we will pass a regular expression and see the type of error returned.

javascript

reg[Symbol.match] = false;   
  
console.log('/bar/'.startsWith(/bar/));

Output:

Error: First argument to String.prototype.startsWith must not be a regular expression.

Supported Browsers: The browsers supported by Symbol.match property are listed below:

Google Chrome 51
Firefox 50
Edge 15
Opera
Apple Safari

We have a complete list of Javascript symbols’ properties and methods, to check those please go through the Javascript Symbol Complete Reference article.

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