How to Add Multiple Classes in React
Table of Contents
React is a popular UI library that lets you build web applications using components.
One of the most important ways to style your components is by using CSS classes.
In this post, we will look at how to add multiple CSS classes in React.
How to add a single class in React
Before we see examples of multiple classes, let's first look at how to add a single class in React.
Remember that in React, you can add a class to an element by using the className
attribute, not the class
attribute.
That looks like this:
JSXconst App = () => {
return (
<div>
<h1 className="header">Hello World</h1>
</div>
);
}
This applies the class header
to the h1
element.
How to add multiple classes in React
Now, let's look at how to add multiple classes in React.
The most straightforward way to add multiple classes is to just add more classes by separating them with a space.
Here's an example:
JSXconst App = () => {
return (
<div>
<h1 className="header large">Hello World</h1>
</div>
);
}
Now the h1
element has two classes: header
and large
.
How to add multiple classes conditionally in React
Sometimes, you may want to add multiple classes conditionally.
For example, you may want to add a class if a certain condition is true.
To do this, simply add a class based on the condition.
Here's an example:
JSXconst App = () => {
const isLarge = true;
return (
<div>
<h1 className={`header ${isLarge ? 'large' : ''}`}>Hello World</h1>
</div>
);
}
In this case, the class large
will only be added if the variable isLarge
is true.
This is a powerful technique that allows you to have full control over which classes are added to your elements.
Conclusion
In this post, we saw how to add a single class, how to add multiple classes, and then how to add them conditionally.
Simply use the className
attribute to add classes to your elements, and separate multiple classes with a space.
Thanks for reading!
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