Скачать или смотреть How to Retrieve the File URL After Uploading Images to Firebase Storage in Vue 3 with Vuex

Learn how to effectively upload images to Firebase Storage and retrieve their URLs in a Vue 3 application using Vuex. This guide simplifies the process and provides a clear code example.
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This video is based on the question https://stackoverflow.com/q/71330155/ asked by the user 'Mike Haslam' ( https://stackoverflow.com/u/4812154/ ) and on the answer https://stackoverflow.com/a/71330579/ provided by the user 'Frank van Puffelen' ( https://stackoverflow.com/u/209103/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Retrieve the File URL After Uploading Images to Firebase Storage in Vue 3 with Vuex

In this guide, we will tackle a common scenario in modern web development: uploading images to Firebase Storage and getting the URL of the uploaded file. If you are using Vue 3 and Vuex, this process may not be straightforward at first glance. Let's walk through the issue and the solution step-by-step.

The Problem

You may find yourself needing to upload an image to Firebase Storage, but then wonder how to retrieve the URL of that uploaded image. Consider the following scenario: you've successfully uploaded an image, but when trying to fetch the download URL, you're encountering problems with promises and asynchronous handling in JavaScript.

Understanding the Code

The provided code outlines an asynchronous function uploadAvatar that takes in the user's authentication ID, the file to be uploaded, and the filename. The function aims to upload an image file to Firebase Storage and retrieve the URL of that image. Here’s an overview of how the initial implementation looks:

[[See Video to Reveal this Text or Code Snippet]]

Issues in the Original Code

Promise Handling: The function doesn't return anything at the top level, leading to a situation where you cannot capture the promise returned by uploadBytes.

Nested Promises: Using multiple layers of .then() can make the code hard to read and understand.

Unnecessary Logic: Some parts of the code could be simplified for better clarity.

Simplifying the Solution

To handle the file upload and retrieval of the download URL more efficiently, here's how you can revise the uploadAvatar function:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes Made:

Return the Promise: The revised function now returns the promise for the URL directly after the upload operation.

Reduced Complexity: By removing unnecessary nested promises, the code is cleaner and easier to follow.

Conclusion

Uploading images to Firebase Storage and obtaining their URLs is an essential skill in modern web development, especially when using frameworks like Vue 3 with Vuex. By understanding async operations and simplifying our promise handling, we can streamline our code and improve its reliability.

If you encounter any errors when uploading or retrieving the URL, ensure to check your Firebase rules and connectivity. Happy coding!