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6 Awesome JavaScript DOM Tips and Tricks You Should Know
Powerful JavaScript DOM tricks and tips that you need to know as a developer.
The DOM or what’s called Document Object Model is a very common programming interface that allows us to work with web documents and make them dynamic.
It defines a page so that programs can update the structure, style, and content of the document.
The document is represented by the DOM as nodes and objects, allowing programming languages to interact with it. In JavaScript, the DOM is not part of the language. So you can think of the DOM as a web API that will allow you to create websites that are interactive and dynamic.
Of course, as a web developer, you will only use JavaScript to manipulate the DOM. However, keep in mind that you can also build implementations of the DOM for any other programming language if you want.
JavaScript DOM is very powerful when it comes to web development in general. There are a lot of useful DOM methods and properties that we can use. You can achieve a lot of things with that.
That’s why in this article, we will show you some awesome JavaScript DOM tips and tricks that you need to know as a web developer. So let’s just get right into it.
1. Only Fire an Event Once
In JavaScript DOM, you can choose to only fire an event once. This means you can allow an event to only be triggered once on a specific element.
To do that, just add the object { once: true } to your event listener.
Here is a code example:
const elem = document.querySelector('button');elem.addEventListener("click", ()=> {
console.log("Hello world");
}, { once: true });
So in the code example above, the string "hello world" will only be printed once in the console when a user clicks the button element. It will not be printed multiple times. It will only be on the first click.
This is a great way to prevent a user from performing an action multiple times. So now just by adding { once: true } , you can achieve the same thing that the method removeEventListener does.
