Скачать или смотреть How to Dynamically Render an input type="file" Value in Vue3

Learn how to display the uploaded file name using Vue3 and enjoy styling your input fields without losing functionality.
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This video is based on the question https://stackoverflow.com/q/75716214/ asked by the user 'Mehmet Ali KOÇAL' ( https://stackoverflow.com/u/19998463/ ) and on the answer https://stackoverflow.com/a/75716272/ provided by the user 'Boussadjra Brahim' ( https://stackoverflow.com/u/8172857/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Dynamically Render an input type="file" Value in Vue3

When you're working on a web application that allows users to upload files, you may encounter a challenge: how do you display the name of the selected file when the file input is hidden or styled with low opacity for aesthetic purposes? If you're using Vue3 in your project, this guide will walk you through the steps to achieve that seamlessly.

The Problem

In your Nuxt project, you have a file input element, and you've set its opacity to zero to achieve a specific styling. While the input does handle file selections, displaying the chosen file name dynamically becomes tricky since the standard input UI is hidden. Initially, you may try to track the file name using a reactive variable but keep running into issues, specifically with Vue not updating the displayed file name correctly.

Here's a brief overview of the initial challenges:

The file name does not update dynamically on the UI after selection.

You might get confused about binding the reactive variable correctly.

The Solution

To display the selected file name dynamically while using Vue3, you'll need to ensure you're accessing and updating the variable correctly. Below are the refined steps to solve this issue.

Step 1: Setting Up Reactive Variable

First, let's create a reactive variable to store the file name. We will utilize Vue's ref() feature, which allows us to define a reactive reference to our file name.

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Step 2: Updating the File Name on Change

Next, you need to define a function that will be triggered whenever the user selects a file. You'll handle the event and assign the selected file's name to your reactive variable:

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Step 3: Binding the Input and Displaying the File Name

Finally, you need to bind the input change event to this function and utilize Vue's template syntax to dynamically display the file name to the user:

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Conclusion

By following these simple steps, you can successfully display the selected file name dynamically in your Vue3 application. Here's a summary of the critical points to remember:

Use ref() to create a reactive variable for the file name.

Use @change directive in the file input to call your function, which updates the filename.

Leverage Vue's template syntax to do a straightforward binding.

Now you can style your input fields elegantly without sacrificing functionality, providing users with a clear indication of their file selections with just a few lines of Vue code!

Remember that when deploying this feature, testing on various browsers is a good practice to ensure all functionalities behave consistently across different environments.

Feel free to enhance the styling further or add additional logic to handle file validation as needed!