How to Use Single Line Regex in JavaScript?

In JavaScript, you can use regular expressions (regex) to match and manipulate strings. A single line regex is a regular expression that matches a single line of text.

Here’s an example of how you can use a single line regex in JavaScript:

let regex = /Hello World/;
let str = "Hello World";
let result = str.match(regex);
console.log(result);

In this example, regex is a regular expression that matches the string “Hello World”. The match method is then used to search for a match between the regex and the string str. If a match is found, the result of the match method will be an array containing the matched string. If no match is found, the result will be null.

You can also use the test method to check if a regex matches a string:

let regex = /Hello World/;
let str = "Hello World";
let result = regex.test(str);
console.log(result);

In this example, the test method is used to check if the regex regex matches the string str. If a match is found, the result of the test method will be true. If no match is found, the result will be false.