The problem was previously. Cannot read property 'push' when uploading invalid file

[MaksTrader]

Prerequisites

• [ ] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [ ] The issue still exists against the latest master branch of bootstrap-fileinput.
• [ ] This is not an usage question. I confirm having read the plugin documentation and demos.
• [ ] This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• [ ] I have attempted to find the simplest possible steps to reproduce the issue.
• [ ] I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

1. 2. 3.

Expected behavior and actual behavior

When I follow those steps, I see...

I was expecting...

Environment

Browsers

• [x] Google Chrome
• [ ] Mozilla Firefox
• [ ] Internet Explorer
• [ ] Safari

Operating System

• [x] Windows
• [ ] Mac OS X
• [ ] Linux
• [ ] Mobile

Libraries

• jQuery version:
• bootstrap-fileinput version:

Isolating the problem

• [ ] This bug happens on the plugin demos page
• [ ] The bug happens consistently across all tested browsers
• [ ] This bug happens when using bootstrap-fileinput without other plugins
• [ ] I can reproduce this bug in a jsbin

[MaksTrader]

Greetings. Faced with the same problem. Checked and tried everything.

It only occurs when the first image is initially loaded.

Afterwards, until the page reloads, the problem does not appear. Images are added and deleted without problem .

[MaksTrader]

The model returns the same data for the first image as for the nex t.

[MaksTrader]

If you check the file download in this way, it happens in all cases, but the file is downloaded and after reloading the page is display ed

[MaksTrader]

But JSON returns empty values .

[kartik-v]

Debug your server code to check why initialPreview and initialPreviewConfig are sending null to the plugin.

If no files are available to send - send a blank json object (do not include initialPreview and initialPreviewConfig in the json response).

[MaksTrader]

Problem solved. The tips were very helpful. Thank you very much.

It wasn't labeled. $preview = []; $config = [];