When you’re writing asynchronous code in JS, you’re in fact piling up function calls. Those callbacks all retain their upvalues which can lead to high memory usage. With coroutines your function can actually be suspended and resumed without having to descend from a pyramid of closures because...
Private variables and functions in JavaScript aren’t just used to modify or report the state of an instance. They do much more. They could be a helper function, a constructor function; even an entire class or module. In other words, “private” in JavaScript doesn’t necessarily mean “im...
In this article, we'll explain why we need to do this. Javascript or React First of all we have Javascript to blame and not React. This is not something we need to do because of the way React works or JSX. It's because of the way this binding works in JavaScript. Let's see what...
Before starting, let’s understand performance optimization. Whenever we develop a React application, we need to consider the render time. Enhancing performance in an application includes preventing unnecessary renders and reducing the time to render our DOM. So, here comes the useCallback() method,...
So now we have anincredibly fast platform(thanks to non-blocking programing) with a programing language that’s incredibly easy to use (thanks to JavaScript). But is it enough? Will it last? I’m sure JavaScript will have an important place in the future. Let me tell you why: ...
Having templates embedded in a close-to-JavaScript syntax yields a major benefit: it's generally easy to use JavaScript tooling with JSX, because JSX files can be transpiled by Babel. I'm not gonna lie, sometimes I miss a cleaner way to do an if statement in my templates, but overall,...
Reactive Extensions for JavaScript unify both the world of Promises, callbacks as well as evented data such as DOM Input, Web Workers, and Web Sockets. Unifying these concepts enables rich composition.To give you an idea about rich composition, we can create an autocompletion service which takes...
Find out why you should not modify a JavaScript object prototype and what to do insteadTHE AHA STACK MASTERCLASS Launching May 27th As programmers, one of the skills we must first learn is how to search for a solution.Google is your friend. And most of the times a StackOverflow answer ...
For basic use of WAMP and Autobahn|JS, you do not need to know anything about promises. As they’re used above, you can think of them as nothing more than a different notation for callbacks. If you are interested in learning more, however, thenHTML5 Rocks’ articleis a good place to...
It's when things don't go as expected that we notice strange behaviour. What do you think happens when thePrice.update()function throws an error? A: The error is caught in the catch block, logged, and a 500 status code is sent to the client ...