JAVASCRIPT

js startswith

var str = "Hello world, welcome to the universe.";
var n = str.startsWith("Hello");

js startswith

const str1 = 'Saturday night plans';

console.log(str1.startsWith('Sat'));
// expected output: true

console.log(str1.startsWith('Sat', 3));
// expected output: false

JavaScript String startsWith() examples

JavaScript startsWith() Case sensitive Example
const text = 'Hello, Welcome to JavaScript World';
console.log(text.startsWith('Hello')); // true
console.log(text.startsWith('hello')); // false

javascript string starts with

const s = 'I am going to become a FULL STACK JS Dev with Coderslang';

console.log(s.startsWith('I am'));             // true
console.log(s.startsWith('You are'));          // false

startswith in javascript

if (!String.prototype.startsWith) {
    Object.defineProperty(String.prototype, 'startsWith', {
        value: function(search, rawPos) {
            var pos = rawPos > 0 ? rawPos|0 : 0;
            return this.substring(pos, pos + search.length) === search;
        }
    });
}