How Can I Remove Individual Files from a FileList in a Drag-and-Drop Web Application?

How to Remove Files from the FileList in a Drag-and-Drop Web Application

When constructing a drag-and-drop-to-upload web application, you may encounter a scenario where you need to remove specific files from the FileList. This can present some challenges due to the readonly nature of the FileList attribute in HTMLInputElement.

However, you have two options available:

1. Remove the Entire FileList

If you want to delete the entire FileList, you can set the value property of the input element to an empty string. This will erase the entire list of selected files.

document.getElementById('multifile').value = "";

2. Remove Specific Files (Not Possible)

Unfortunately, it is not possible to remove specific individual files from the FileList. This is due to the readonly nature of the FileList API.

If you absolutely need to filter out certain files, you will need to implement custom checks in the code that interacts with the FileList. This may involve iterating over the FileList and checking individual files against your criteria.

While this method is not as convenient as being able to delete files directly from the FileList, it is still possible to achieve your desired functionality.

The above is the detailed content of How Can I Remove Individual Files from a FileList in a Drag-and-Drop Web Application?. For more information, please follow other related articles on the PHP Chinese website!