Sprawdź, czy JavaScript Substring
const string = "javascript";
const substring = "script";
console.log(string.includes(substring)); //true
Batman
const string = "javascript";
const substring = "script";
console.log(string.includes(substring)); //truevar string = "foo",
substring = "oo";
console.log(string.includes(substring));const string = "foo";
const substring = "oo";
console.log(string.includes(substring));s = "Hello world";
console.log(s.includes("world"));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)let text = "Hello world, welcome to the universe.";
let result = text.includes("world"); // return boolean value