JavaScript RegExp \0 Metacharacter

The RegExp \0 Metacharacter in JavaScript is used to find the NULL character. If it is found it returns the position else it returns -1.
Syntax: 

/\0/ 

or

new RegExp("\\0")

Example 1: This example searches for the Null character in the string.  

Javascript

function geek() {
    let str1 = "GeeksforGeeks@_123_$";
    let regex4 = /\0/;
    let match4 = str1.search(regex4);
    if (match4 == -1) {
        console.log("No Null characters present. ");
    }
    else {
        console.log("Index of Null character: " + match4);
    }
}
geek()

Output

No Null characters present. 

Example 2: This example searches the position of the NULL character in the string. 

Javascript

function geek() {
    let str1 = "123ge\0eky456";
    let regex4 = new RegExp("\\0");
    let match4 = str1.search(regex4);
    console.log(" Index of NULL character: " + match4);
}
geek()

Output

 Index of NULL character: 5

Supported Browsers: The browsers supported by RegExp \0 Metacharacter are listed below: 

• Google Chrome
• Apple Safari
• Mozilla Firefox
• Opera
• Internet Explorer

We have a complete list of Javascript RegExp expressions, to check those please go through this JavaScript RegExp Complete Reference article.

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.