1const string = "foo";
2const substring = "oo";
3
4console.log(string.includes(substring));
1var str = "We got a poop cleanup on isle 4.";
2if(str.indexOf("poop") !== -1){
3 alert("Not again");
4}
5//use indexOf (it returns position of substring or -1 if not found)
1var string = "foo";
2var substring = "oo";
3
4console.log(string.indexOf(substring) !== -1);