Add Startswith In Ie 11

When it comes to writing code and developing websites, it's essential to ensure compatibility across different browsers. Internet Explorer 11 (IE 11) is a browser that still sees some use, especially in enterprise environments. In this article, we'll take a look at how you can use the `startsWith` method in JavaScript while ensuring compatibility with IE 11.

The `startsWith` method is a handy feature introduced in ECMAScript 6 that allows you to check if a string starts with a specific set of characters. While this method is widely supported in modern browsers, including Chrome, Firefox, and Edge, IE 11 does not natively support it. So, how can we implement this functionality in IE 11?

To add support for `startsWith` in IE 11, we can use a simple polyfill. A polyfill is a piece of code that provides modern functionality on older browsers that lack support for certain features. For `startsWith`, we can create a polyfill that mimics the behavior of the method.

Here's a basic polyfill for the `startsWith` method that you can add to your code:

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

By including this polyfill in your code, you can now use the `startsWith` method in IE 11 just like you would in a modern browser. Let's break down how this polyfill works:

1. The code first checks if the `startsWith` method is not already defined on the `String.prototype`. If it's not, the polyfill is applied.
2. It defines the `startsWith` method on the `String.prototype`, which allows you to call it on any string object.
3. The method takes two parameters: `search`, which is the substring to search for at the beginning of the string, and `pos`, which is an optional parameter that specifies the position in the string at which to begin searching.

With this polyfill in place, you can now use the `startsWith` method in your JavaScript code without worrying about compatibility issues in IE 11. This simple solution ensures that your code remains functional across a wider range of browsers, making your websites more accessible to all users.

In conclusion, adding support for `startsWith` in IE 11 is a straightforward process that involves using a polyfill to replicate the method's functionality. By implementing this solution in your code, you can write more efficient and consistent JavaScript code that works seamlessly across different browsers.