In modern programming, there is plenty of discussion about what is known as state, which most commonly revolves around user interactivity. The MutationObserver is a powerful API that can help us with this because we can use it to react to user interactivity. It is what replaced the legacy Mutation Events API from the DOM3 Events specification.
To create a
MutationObserver, we need to instantiate it with the
new keyword along with a callback like so:
onMutation callback receives two arguments (in order):
Mutations— A list of
MutationObserverthat was constructed. In…
Knowing design patterns is vital in the software industry, as they have been proven to solve real-life problems in business applications. For example, Publish/Subscribe is a common pattern that is extensively used in the DOM. The Command pattern is used in Redux, which boomed in a short period of time due to its unique, robust, and simple ability to manage app state that is also very scalable.
The interesting part about design patterns is that they aren’t one-size-fits-all solutions. …
Have you ever come across code where some function was suffixed with
The way the Adapter works is that you create a function (which can be a class, but it doesn’t have to be implemented as a class) that adapts its interface’s properties and methods into a new class seamlessly — as if the adapter…
It is important to keep in consideration the different scenarios in which errors could occur while writing your code. They play an integral part in your web application because you can avoid deadly scenarios (like your application crashing completely) that would otherwise not have been avoided if left unhandled.
It’s often useful to provide a more descriptive error inside your error handlers. And by this, I don’t just mean writing your error message clearer. What I’m referring to is to extend the
Since functions can be passed around anywhere, we can pass them into the arguments of functions.
We’ll be going over five critical tips to compose event handlers in React. This article won’t cover everything that’s possible, but it’ll cover important ways to compose event handlers that every React developer should know at a minimum.
If you’ve been a React developer for a while you might agree with me that working with state can easily be the biggest pain in your day.
So here’s a tip that might help keep you from introducing silent but catastrophic errors: Avoid closures referencing state values from their callback handlers.
If done right, you should have no problems dealing with state in callback handlers. But if at just one point you slip and introduce silent bugs that are hard to debug, that’s when the consequences begin to engulf time in your day that you wish you could take back.
React is a popular library that developers can use to build highly complex and interactive user interfaces for web applications. Many developers that utilize this library to build their apps also simply find it fun to use for many great reasons. For example, its declarative nature makes it less painful and more entertaining to build web apps because code can become predictable and more controllable in our power.
So what makes it less painful then, and what are some examples that can help demonstrate how React can be used to build highly complex and interactive user interfaces?
This article will…
This pattern actually provides the same goal as dependency injection, but in a more flexible and powerful way by acting as the container that houses dependencies of functions (or classes) that require them in times they need it, such as during their initialization phase.
Let’s quickly refresh our minds on what dependency injection is, what it looks like in code, what problems it solves, and what problems it suffers from.
Dependency injection is a pattern that…
React is an incredible library to build complex user interfaces, and if you’re new to React, then this article might help you understand how powerful it is for web developers. And if you’re not new to React, then you’ll probably not find anything new in this post, but, hopefully, you might find something new since I’ll be trying to expose both old and new strategies to work with React components.
In this article, we’ll be going over nine ways…