Problem Statement

check if string contains specific substring using JavaScript

Solution

to check if a string contains a given substring using JavaScript, we can use String includes() method. call includes() method on the string, and pass the substring as argument. includes() returns true if the string contains the substring, or false if the string does not contain the substring

Program

1. given string is str and substring is substr. check if string str contains substr

str = "hello world";
substr = "wor";

if ( str.includes(substr) ) {
    console.log('string contains specified substring');
} else {
    console.log('string does not contain specified substring');
}