JavaScript RegExp m Modifier
The RegExp m Modifier in JavaScript is used to perform multiline matching. It takes the beginning and end characters (^ and $) as working when taking over multiple lines. It matches the beginning or end of each line. It is case-sensitive.
Syntax:
/regexp/m
or
new RegExp("regexp", "m")
Example 1: This example searches the word “geeksforgeeks” at the beginning of each line in a string.
Javascript
function geek() {
let str1 = "geeksforgeeks is the computer "
+ "science portal for geeks." ;
let regex4 = /^geeksforgeeks/gm;
let match4 = str1.match(regex4);
console.log( "Found " + match4.length
+ " matches: " + match4);
}
geek();
|
Output
Found 1 matches: geeksforgeeks
Example 2: This example searches the word “geeksforgeeks” at the beginning of each line in a string and replaces it with “GEEKSFORGEEKS”.
Javascript
function geek() {
let str1 = "geeksforgeeks is the computer "
+ "science portal for geeks." ;
let regex4 = new RegExp( "^geeksforgeeks" , "m" );
let replace = "GEEKSFORGEEKS" ;
let match4 = str1.replace(regex4, replace);
console.log( " New string: " + match4);
}
geek();
|
Output
New string: GEEKSFORGEEKS is the computer science portal for geeks.
Supported Browsers: The browsers supported by RegExp m Modifier 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.
Last Updated :
30 May, 2023
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