Tools such as caniuse.com provide helpful browser compatibility information. On that site, you can search for language features and see:
- The browser versions that support those features
- Which browser versions don’t support those features
- What percentage of internet users are using these versions
From this information, you can see whether your site can reach the number of users you want. In the upcoming exercises, we will learn how Babel can improve our site’s compatibility across browsers and their versions.