Paste output is not triggered when input is not empty (at least in Firefox)

[martin-yumsto]

Which @angular/* package(s) are the source of the bug?

common, core

Is this a regression?

Yes

Description

(paste) output on the input element is not triggered if there is already a content inside the element. It seems it works fine if you paste by right clicking and selecting paste from context menu. It doesn't work when using keyboard shortcuts - ctrl/cmd + v

A great folk named Frederik, prepared this small sandbox with pure js: https://jsfiddle.net/zuxwqakg/ and this one with minimal Angular to reproduce: https://stackblitz.com/edit/stackblitz-starters-sz8ifv

You can see pure js works perfectly fine, but Angular one works in Chrome, but not (at least) in the Firefox

Steps to reproduce:

• copy something in clipboard
• paste it inside an empty input -> it triggers paste function
• paste it again in the same input -> it's appended but paste function is not triggered

Please provide a link to a minimal reproduction of the bug

https://stackblitz.com/edit/stackblitz-starters-sz8ifv

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in (run ng version)

Angular CLI: 17.2.0
Node: 20.10.0
Package Manager: pnpm 8.14.1
OS: darwin arm64

Angular: 17.2.1
... animations, common, compiler, compiler-cli, core, forms
... localize, platform-browser, platform-browser-dynamic
... platform-server, router, service-worker

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1702.0 (cli-only)
@angular-devkit/build-angular   17.2.0
@angular-devkit/core            17.2.0 (cli-only)
@angular-devkit/schematics      17.2.0 (cli-only)
@angular/cdk                    17.2.0
@angular/cli                    17.2.0
@angular/ssr                    17.2.0
@schematics/angular             17.2.0 (cli-only)
rxjs                            7.5.7
typescript                      5.3.3
zone.js                         0.14.3

Anything else?

Firefox details:
Name Firefox
Version 123.0
Build ID 20240213221259

[alxhub]

I cannot reproduce this in Firefox 123.0.1 with the given StackBlitz. The paste log triggers every time. (note that the Firefox dev console deduplicates logging statements)

[martin-yumsto]

@alxhub what platform did you try it on? I remember, there was another guy with Mac saying he was able to reproduce it. As well as different dev with linux saying it's not reproducible for them.

[alxhub]

I'm on Mac, using the latest Firefox.

[pkozlowski-opensource]

Also one should verify if a problematic browser is not running any extensions that could interfere.

[Totati]

I could not reproduce it on Windows 10, Firefox 123.0.1

[alxhub]

Closing as a few of us have tried and we've been unable to reproduce the issue. Feel free to reopen the issue if a reproduction can be narrowed down.

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