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You can think of it as setting up a bridge between the JavaScript layer and the native layer.

Native Modules allow us to execute native code from within JavaScript. Obviously, we can’t touch the UI in these tasks, but we can register a HeadlessTask like we would a React application in AppRegistry: AppRegistry.registerHeadlessTask('DemoTask', () => require('DemoTask')) Headless JS is a way to run JavaScript tasks in the background. First, let’s go over some fundamental tools that we’ll use. Headless JS is available only for Android, therefore, we’ll focus only on Android development in this article. In this article, we’ll learn to execute background operations in React Native using Native APIs and Headless JS. Instead, React Native uses Headless JS to execute JavaScript code in the background. It is not as simple as writing a function in JavaScript, where the function is executed even after the activity is killed. In React Native, performing a task in the background might seem daunting at first. Usually, an app is in the background if no activities are visible to the user. Run React Native background tasks with Headless JSīackground processing is an important part of mobile application development, particularly when you want to poll a server or periodically send data to a server. Currently exploring JavaScript and Flutter, and trying to come up with solutions to problems in the healthcare sector. Debjyoti Banerjee Follow I'm Debjyoti, software engineer and game developer.