JavaScript startsWith function string, characters

JavaScript starts with a string.

function startsWith(data, input) {
    return data.substring(0, input.length) === input;
}

String.prototype.startsWith = function (input) {
    return this.substring(0, input.length) === input;
};
var url = "https://www.example.com/";

console.assert(url.startsWith("https://") === true);
console.assert(url.startsWith("http://") === false);
console.assert(startsWith(url, "https://") === true);
console.assert(startsWith(url, "http://") === false);

1 comment

  1. anonymous

    good

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