JavaScript StartSwith
var str = "Hello world, welcome to the universe.";
var n = str.startsWith("Hello");
qiankunli
var 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); //> trueconst str1 = 'Saturday night plans';
console.log(str1.startsWith('Sat'));
// expected output: true
console.log(str1.startsWith('Sat', 3));
// expected output: false
//checks if a string starts with a word
function startsWith(str, word) {
return str.lastIndexOf(word, 0) === 0;
}
startsWith("Welcome to earth.","Welcome"); //trueJavaScript startsWith() Case sensitive Example
const text = 'Hello, Welcome to JavaScript World';
console.log(text.startsWith('Hello')); // true
console.log(text.startsWith('hello')); // falseif (!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;
}
});
}