JavaScript syntax for handling operations that take time, like fetching data.
Async/Await is modern JavaScript syntax for handling asynchronous operations — things that take time, like fetching data from an API, reading a file, or waiting for a Database query. Instead of complex Callback chains, async/await lets you write asynchronous code that reads like synchronous code.
Mark a Function as async, then use await to pause until a Promise resolves. Wrap async code in Try/Catch for Error Handling to handle errors gracefully. This is how you fetch data in modern JavaScript and React applications.
In React Router, loaders and actions are async functions that await Supabase queries. The formData extraction in actions also uses await: const formData = await request.formData(). When an awaited operation fails, the catch block can return an error for useActionData to display, or throw to trigger an Error Boundary. Logging the results of each await step helps with Debugging — you can trace the data flow in the browser console.
We give you the skills to build, deploy, and own a full product. Professional stack, AI co-pilot, no coding background required.