var string = "foo", substring = "oo"; console.log(string.includes(substring));
const string = "foo"; const substring = "oo"; console.log(string.includes(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)
const pets = ['cat', 'dog', 'bat']; console.log(pets.includes('cat')); // output: true
"FooBar".includes("oo"); // true "FooBar".includes("foo"); // false "FooBar".includes("oo", 2); // false