React TutorialLesson 18Free preview

React JSX Expressions

This lesson is part of React · All levels

Summary

In JSX you can put a JavaScript expression in it by wrapping it in curly braces. Expressions can be variables, calculations, function naming, or arrays rendered into a list of elements. Everything in {} should be worth, not statements like if or for.

Key points

Use {} to insert JavaScript expressions into JSX
The boolean values, null, and undefined do not produce a display
The array can be rendered directly into a list of elements
Statements like if and for should not be in {}

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