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React Deep Dive: From Beginner to Advanced

Using CSS Classes in JSX

Explore how to declare and apply CSS classes in JSX using the className attribute and how to conditionally assign classes dynamically with the classnames package. Understand how to style React components efficiently using traditional CSS alongside JavaScript logic for better styling control.

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Declaring classes

It is much cleaner and nicer to use real CSS classes in JSX, just like we do in regular HTML, with the difference being that we declare classes by using className instead of class:

<div className="item">...</div>

React renders normal syntax with our HTML equivalent:

<div class="item">...</div>

It is also quite common to concatenate values in the className prop dynamically:

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