Sprawdź, czy ciąg zawiera podłoże w JavaScript?
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 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: trueconst string = "foo";
const substring = "oo";
console.log(string.includes(substring)); // true
Run code snippet
ECMAScript 6 introduced String.prototype.includes:
const string = "foo";
const substring = "oo";
console.log(string.includes(substring)); // truestringVariable.includes("Your Text");