However, if you check the console log, you will see that there is a warning like, “Warning: Each child in a list should have a unique key prop.” Whenever you use a loop it is important to provide a unique key attribute. import React from ‘react’Ĭonst animals =
You will rarely need a loop other than this one. The most common way of doing that is with the map function that will return JSX. When I first started with React, I realized quite early that I did not know how to loop through an array and render a list of items.
You can read more about it on the React website. The above will be converted to something like this However, remember that JSX will not work directly in browsers and requires a build step to convert JSX markup into React.createElement function calls. It might remind you a bit of a templating language, but with JSX you can use the full power of JavaScript. JSX is a custom syntax extension to JavaScript which is used for creating markup with React. If you have worked with React before, then there is a high probability that you know what JSX is, or have at least heard of it. Wondering how to create loops in React? Learn about JSX and how to use methods like the map function to loop inside React JSX and render a list of items.
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