FileUpload shouldn't post to url if none is provided

[ntjess]

Describe the bug

The FileUpload component provides an optional url parameter that defaults to null if unspecified. However, it will always post to this url, so leaving it unpopulated causes errors to appear in the console:

<FileUpload :auto="true" />

Selecting a document produced the console error:

POST http://localhost:5173/null 404 (Not Found)

My expectation is that no url specified means no post should occur.

Potential PR

I think this is the only line to change?

primevue/packages/primevue/src/fileupload/FileUpload.vue

Line 225 in 8cf3f0c

xhr.open('POST', this.url, true);

It just needs to change to conditionally check for null, right?

Pull Request Link

No response

Reason for not contributing a PR

• Lack of time
• Unsure how to implement the fix/feature
• Difficulty understanding the codebase
• Other

Other Reason

No response

Reproducer

https://stackblitz.com/edit/primevue-4-vite-issue-template-3jqjjbaa?file=src%2FApp.vue

Environment

Macos / node 22.11.0

Vue version

3.4.27

PrimeVue version

4.1.1

Node version

22.11.0

Browser(s)

No response

Steps to reproduce the behavior

1. Open dev console
2. Click "upload"
3. Select a file
4. Observe the error logged in the console

Expected behavior

No POST request made, since no url was specified