Lifting state for data visibility

- [Instructor] Now we have a status updater … that can read messages from our little API … and post new ones. … But to see the new ones, we have to reload the page. … In this video, we'll start fixing that problem … using a very common task in React, lifting up state. … We want to let this post form … add to the list of status messages … when it sends a new one to the API. … React's data flow is one way, downhill only, … from parents to children via props. … These two components are siblings … and they can't talk to each other directly. … In order for both of them to be able to access … the messages state, which is currently … in the message list component, … we need to lift it out of there, into their shared parent. … During the planning phase, we'll often catch … possible issues like this before we even start, … but sometimes we don't and in the course of building a site, … needs can change, so this is a very common exercise … that's worth going through now. … And it's not very strenuous exercise. …