How Do You Turn on Hermes in Expo?

Have you ever wondered how to turn on Hermes in Expo? Well, look no further because we’ve got you covered. But first, let’s understand what Hermes is and why it’s important.

What is Hermes?

Hermes is an open-source JavaScript engine optimized for React Native. It’s designed to improve the startup time, decrease the memory footprint, and optimize the overall performance of your React Native application.

Why is Hermes important?

React Native apps generally suffer from performance issues due to their large size. This can cause lagging and slow startup times, leading to a poor user experience. By using Hermes, you can improve your app’s performance and ensure that it runs smoothly.

How to turn on Hermes in Expo?

Now that we’ve established why Hermes is important let’s take a look at how you can turn it on in Expo.

Step 1: Install the required dependencies

You’ll need to make sure that you have the latest version of Expo installed along with React Native. You can do this by running the following command in your terminal:

“`
npm install -g expo-cli
“`

Step 2: Create an Expo project

Next, create a new Expo project by running the following command:

“`
expo init my-project
“`

This will create a new project directory with all the necessary files.

Step 3: Enable Hermes

To enable Hermes, add the following line of code to your app.json file:

“`
“expo”: {
“android”: {
“buildType”: “hermes”
}
}
“`

This tells Expo to build your app using Hermes instead of the default JavaScript engine.

That’s it! You’ve successfully turned on Hermes in your Expo project.

Conclusion

Hermes is a powerful tool for improving the performance of your React Native application. By enabling it in your Expo project, you can ensure that your app runs smoothly and efficiently. With these simple steps, you can easily turn on Hermes and take advantage of its benefits.