In addition to APIs supplied by React Native, there are lots of community packages with native code that must be linked to your application before usage. There are several steps you should do when linking a package with API, and it differs from package to package and from API to API, so you should be familiar with the process before we dive deeper into APIs in this chapter and into packages in the next one.
First of all, it's important to understand that linking of libraries or APIs can be done only in an application generated by the react-native init command or by those made with Create React Native App and ejected. This is due to the fact that linking process registers native packages for iOS and Android. In create-react-native-app, since you don't have ios and android folder with native code, linking simply won't work...