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Implementing String.StartsWith() in JavaScript
JavaScript does not natively provide a direct equivalent of C#'s String.StartsWith method. However, with the introduction of ECMAScript 2015 (ES6), the String.prototype.startsWith() method was added as a standard feature.
Unfortunately, at the time of this writing, ES6 browser support is still limited. Therefore, if you need to use this functionality in older browsers, you will need to utilize a shim or polyfill.
Polyfill Implementation
To implement a shim that faithfully adheres to the ES6 specification, consider using either:
Example Usage
Once you have installed the shim, you can use the String.prototype.startsWith() method as follows:
console.log("Hello World!".startsWith("He")); // true var haystack = "Hello world"; var prefix = 'orl'; console.log(haystack.startsWith(prefix)); // false
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