#Expo dark mode switch update#
#Expo dark mode switch code#

And kind of got into - I was in consulting at the time. When it was first released, I thought it was an awesome project, so I jumped in and started contributing right away. So for those of us who aren't familiar with your work, do you want to give us a little bit of a background?Д«RENT: Sure, so React Native has been out for something like five years now. And since then, I've been passingly familiar with your work, because we sort of work on different ends of the spectrum, or so I thought until we started talking about this episode. It was out in Portland, so I got to play host a little bit in the home city. I emceed Chain React, or co-emceed Chain React, was it last year?

Brent, thank you so much for coming on.Д«RENT: Yeah, absolutely, thanks for having me. JASON: Hello, everyone, and welcome to another episode of 'Learn with Jason.' Today on the show, we have Brent Vatne. Communication Access Realtime Translation (CART) is provided in order to facilitate communication accessibility and may not be a totally verbatim record of the proceedings. We define two screens called A and B,Д®ach screen has a different tab colour, red for A and blue for B.Captions provided by White Coat Captioning ( ). Here is where we use react navigation to create our tab navigator. Import store from './store' import ) export default CustomerTabNavigator Here is a GIF that might help clear up how it work.

Redux updates the state in all the components.

The reducer (also called toggleTheme) updates the old state to a new state, it changes the colour from red to blue.

This dispatches an action to the Redux store (action is called toggleTheme).

Change tabs from main to the secondary page.

Redux sets the initial (state) colour to red.

Here is brief summary how Redux will work with this app. There are many great tutorials about Redux, I particularly liked this one.

#Expo dark mode switch update#

We can change the state in one component and Redux will update the state in all the other components. In more complicated React Native apps, with lots of components and sub-components. The diagram above explains pretty well why you may need to use Redux. Of course, in this example, we will be using Redux with a React Native app. Redux is used to manage global state across a React app, it can actually be used with both React and React Native. Also, it's the recommended navigation library for Expo.

#Expo dark mode switch code#

The main reason for using this library is because it's written purely in JavaScript so no native code (Swift/Android) is required to make it work. Is a library that helps you simplify app navigation. This article is written in British English however, the code is written using American English to make it more consistent (colour vs color).

In this article, I will show you how you can theme your Expo I ended up being able to do it using Redux. I wanted to theme the app so that the header would change colour depending on which page you're on.ДЇor example on the primary page it would be red and on the secondary page, when you change tabs, the I built a simple tab navigator using React Navigation library. Recently whilst developing a React Native app (with Expo),