![]() ![]() The traditional map() callback can take 3 arguments:-element, index and the source array. The this here would be the array that we will use this myMap.The returned values from our 'callback' are pushed in the temp.It has a temp array that gets returned by the myMap function.myMap() takes in a parameter which a callback/function.Let's create our own map method called myMap ![]() Using bespoke code, polyfills assist us in making this achievable. However, as developers, we would prefer that our apps function across all browsers. These array functions replace the traditional. ![]() These methods are very popular among JavaScript developers as they make the code short, simple, and clean. Now, this feature might not be supported by all older browsers. The map (), filter (), and reduce () are the array functions that allow us to manipulate an array according to our own logic and return a new array after applying the modified operations on it. Polyfills is the solution to the problem.□□Ī piece of code called polyfill is used to add support for more recent features in earlier browsers that don't already have native support for them.įor instance, let's pretend □ that as part of their language iteration, JavaScript releases a new function, let's say x. Who wouldn't desire cross-browser compatible web programmes that run smoothly in every online browser? But as JavaScript gains more and more new features, many outdated □ browsers no longer support all of them. ![]()
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