Does JavaScript Have a Built-in Function for Escaping Regex Special Characters?

Regex Escaping in JavaScript

Is there a built-in function in JavaScript for escaping special characters in strings intended for use in regular expressions?

Answer:

No, there is no built-in RegExp.escape function in JavaScript. However, the above-mentioned function can be used to achieve the desired result:

function escapeRegex(string) {
    return string.replace(/[/\-\^$*+?.()|[\]{}]/g, '\$&');
}

This function escapes all special characters that are interpreted by regular expressions, including /, , -, ^, $, *, , ?, (), |, [, ], and { }.

Here is an example of how to use the function:

var usersString = "Hello?!*`~World()[]";
var expression = new RegExp(escapeRegex(usersString));
var matches = "Hello".match(expression);

In this example, the escapeRegex function is used to escape the special characters in the usersString variable. The resulting string is then used to create a new regular expression object. The match method is then used to search for matches of the regular expression in the Hello string.

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