Sprawdź, czy ciąg zaczyna się od JavaScript
var str = "Hello world, welcome to the universe.";
var n = str.startsWith("Hello");//true
var str = "Hello world, welcome to the universe.";
var n = str.startsWith("Hello");//truevar str = "Hello world, welcome to the universe.";
var n = str.startsWith("Hello");const str = "Saturday night plans";
const res = str.startsWith("Sat");
console.log(res); //> true//checks if a string starts with a word
function startsWith(str, word) {
return str.lastIndexOf(word, 0) === 0;
}
startsWith("Welcome to earth.","Welcome"); //true