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Use inline if to make a shorter conditional syntax in React

in React on May 5, 2021

To use the the components in React conditionally we can make use of if-else conditions in JavaScript.

In this React rendering example we saw how we can do that. But what if we want a shorter syntax? We can use inline conditions in JSX to do that.

There are two different ways we can use inline if in React.

Inline If with Logical && Operator

Just embed the expressions by wrapping them into curly braces including the JavaScript logical operator (&&).

Just like this:



{unreadMessages.length > 0 &&
  <h2>
    You have {unreadMessages.length} unread messages.
  </h2>
}


This is how it works:

  • true && expression => expression
  • false && expression => false

So, if the condition before && is true then React will go for the code after && and will render the output. If not, React will ignore it and skip the execution of the code after &&.

Here’s the demo:

Inline If-Else with Conditional Operator

You can also use Conditional Operator in JavaScript for inline conditional rendering.

Like this:


condition ? true : false

Just like this example we can just conditionally render one or more words.

It doesn’t have to be just one word. We can use it with a larger expressions as well.

Let’s try to change the elements storing in variables example

amazon

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