javascript find substring in string code example

Example 1: check for substring javascript

const string = "javascript";
const substring = "script";

console.log(string.includes(substring));  //true

Example 2: js string search

var str = "This is a test sentence";
var hasTest = str.includes("test");

if(hasTest == true){
	//do a thing 
}

Example 3: indexof javascript

Array.indexOf(searchElement, fromIndex)