In this article, we will see how to dynamically create a CSS class and apply it to the element dynamically using JavaScript. To do that, first, we create a class and assign it to HTML elements on which we want to apply CSS property. We can use className and classList properties in JavaScript. Show Approach: The className property is used to add a class in JavaScript. It overwrites existing classes of the selected elements. If we don’t want to overwrite then we have to add a space before the class name. // It overwrites existing classes var h2 = document.querySelector("h2"); h2.className = "test"; // Add new class to existing classes // Note space before new class name h2.className = " test"; The classList property is also used to add a class in JavaScript but it never overwrites existing classes and adds a new class to the selected elements class list. // Add new class to existing classes var p = document.querySelector("p"); p.classList.add("test"); After adding new classes to the elements, we select the new class(test) and then apply CSS properties to it, with the help of style property in JavaScript. In this article, we will see how to add or remove the CSS classes to an element using jQuery. To add the CSS classes to an element we use addClass() method, and to remove the CSS classes we use removeClass() method. Syntax:
Example: In the this example, we first create an image element and two buttons, the first button for adding CSS classes and the second button for removing CSS classes. When users click on the first button, the addClass() method is called and the class is added to the image element. When the user clicks on the second button, the removeClass() method is called and the class is removed from the image element. For the next few weeks, I want to go back-to-basics and look at JavaScript fundamentals. Today, we’re going to look at how to add and remove classes from multiple elements. Let’s dig in! An exampleLet’s imagine you have some CSS that affects the color of some text, like this.
And you’ve got some HTML like this.
You want to add the 0 class from an element that has it.Let’s look at a few techniques that we can combine to do just that. Getting all of the elementsTo get all of the elements we want to modify, we can use the 1 method. You pass in a CSS selector string (any valid CSS selector, including complex ones, will work), and it returns a 2 of matching elements.
Here’s a demo. Adding and removing classesYou can add and remove classes from an element using the 3 API.It provides a handful of methods you can use to add, remove, toggle, and check for classes on an element. We can use the 4 method to add a class, and the 5 method to remove a class. Do not include the leading dot ( 6) when passing in the class name.This method only works on a single element, not a collection of them.
Here’s another demo. You can also add or remove multiple classes by passing them in as a comma-separate list.
Looping through each elementTo add and remove classes from multiple elements, we need to loop through each one in the 2 we get back from the 1 method and use the 3 API with it.There are many ways to do that, but the two easiest are with the 0 method and the 1 loop.Here’s a 1 loop.
Here’s a demo of the 1 loop.And here’s how you’d do it with the 0 method.
And here’s a demo of the 0 method.I generally prefer the 1 loop as I think it’s simpler to write.However, the 0 method can also be called directly on the 2 returned from the 1 method, without saving it to a variable. That might be useful on occasion.
How to dynamically add and remove class in JavaScript?Usage of addClass jQuery function
addClass("myClass"); In the above code, we have added a class that is called “myClass” to an element by providing the selector. If we add the above class to an element then it will make the text red. But we are going to add the class dynamically through JavaScript.
How to add CSS class dynamically in JavaScript?Add CSS Class To An HTML Element Dynamically Using JavaScript. Add A Class To A Body Element Using classList.add(). Add A Class To A Div Element.. Add A Class To A Div Element Using setAttribute(). Add Multiple Classes To An Element.. Add A Class To Multiple List Type Elements.. Add A Class To An Element On Click.. How to remove and add CSS class in JavaScript?To add the CSS classes to an element we use addClass() method, and to remove the CSS classes we use removeClass() method.
How to remove class name dynamically in JavaScript?You can use removeAttribute class. For example element. removeAttribute("class"); Then you'll get what you want.
|