Test-Driven Development with React and TypeScript by Juntao Qiu

Author:Juntao Qiu
Language: eng
Format: epub, pdf
ISBN: 9781484296486
Publisher: Apress

Check the render method of `BookList`. See https://fb.me/react-warning-keys for more information.

in div (at BookList.jsx:14)

in BookList (at BookList.test.jsx:32)

This is telling us that when rendering a list, React requires a unique key for each of the items, such as id. We can quickly fix it by adding a key for each item in the loop. In our case, as each book has a unique ISBN (the International Standard Book Number), we can use it in the stub server. Now, our final version of BookList looks like this: import React from 'react';

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