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Sebastian MarkbågeandDan Abramov
5aa0c5671f
* Add a DEV warning for common case * Don't set Pending flag before we know it's a promise * Move default exports extraction to render phase This is really where most unwrapping happen. The resolved promise is the module object and then we read things from it. This way it lines up a bit closer with the Promise model too since the promise resolving to React gets passed this same value. If this throws, then it throws during render so it's caught properly and you can break on it and even see it on the right stack. * Check if the default is in the module object instead of if it's undefined Normally we'd just check if something is undefined but in this case it's valid to have an undefined value in the export but if you don't have a property then you're probably importing the wrong kind of object. * We need to check if it's uninitialized for sync resolution Co-authored-by: Dan Abramov <dan.abramov@me.com>
react
React is a JavaScript library for creating user interfaces.
The react package contains only the functionality necessary to define React components. It is typically used together with a React renderer like react-dom for the web, or react-native for the native environments.
Note: by default, React will be in development mode. The development version includes extra warnings about common mistakes, whereas the production version includes extra performance optimizations and strips all error messages. Don't forget to use the production build when deploying your application.
Example Usage
var React = require('react');