js if istring includes get value code example

Example 1: js string contains

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

Example 2: .includes( string

var str = "Hello world, welcome to the universe.";
var n = str.includes("world");

Example 3: string.contains javascript

var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
	alert("Not again");
}