react.dev/docs/common-questions.md

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What browsers does React support?

React supports the latest two Chrome, Firefox, Safari, and Internet Explorer versions. React can work with Internet Explorer 8 with polyfills.

How do I get React to support Internet Explorer 8?

React requires ES5 JavaScript shims to run in Internet Explorer 8. Include the ES5 Shims and shams and [console-polyfill)(https://github.com/paulmillr/console-polyfill/) to implement these shims.

Who uses React?

The Instagram website is built entirely in React. The Facebook website is also increasingly using React, including the common commenting plugin across the site.

I don't get it. React is confusing!

This blog post by a member of the React team talks about some of the reasons why React is designed the way that it is.

Can I integrate with other JavaScript libraries?

Absolutely! In fact, we encourage it! See our GitHub repo for a TodoMVC example using Backbone and a jQuery + Bootstrap modal demo.