contain in js string code example

Example 1: string.contains javascript

let string = "This string contains pizza";
if(string.includes("pizza") {
	console.log("It's pizza time!");   
}

Example 2: javascript contains substring

var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
	alert("Not again");
}
//use indexOf (it returns position of substring or -1 if not found)