What is the purpose of the key attribute when rendering lists?

Keys help React determine which elements have changed, been added, or removed. They must be specified so that React can match array elements over time. The best way to choose a key is to use a string that will clearly distinguish a list item from its siblings. Most often, you will use an ID from your data as a key.

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In this article you will understand how to add a web tutorial on a website for guests using React components. With the ability to define to which elements hints will be linked and how many such links must exist, it …
SEO recommendations from Google were used to improve the paginator and infinite scroll using replace and push states for the URL. A tag system was also developed for the site. A gallery was added.
Describing how to create basic/testing React app in terminal. Also checking for errors tests.