Search Issue Tracker

Fixed in 2020.1.X

Fixed in 2019.3.X



Found in





Issue ID




[WebGL] Mouse events are not called on builds when the scene does not have Event System object



How to reproduce:
1. Open the attached project ("")
2. Open the repro scene ("SampleScene")
3. Enter Play Mode
4. Click on the sprite object and notice how it rotates after receiving OnMouseDown event
5. Exit Play Mode
6. Make a WebGL build and run it
7. Click on the sprite object again

Expected results: The sprite is rotated in OnMouseDown event the same way as in the Editor
Actual results: The sprite is not rotated as OnMouseDown is not called when clicking on the object

Reproducible with: 2019.2.0a7, 2019.2.9f1, 2019.3.0b6, 2020.1.0a8
Not reproducible with: 2017.4.33f1, 2018.4.11f1, 2019.2.0a6

1. OnMouseEnter and OnMouseExit events are also not called
2. Adding Event System in the scene fixes the issue in some cases
3. Disabling Engine Code Stripping also fixes the issue

  1. Resolution Note (fix version 2020.1):

    Fixed in 2020.1.0a21

  2. Resolution Note (fix version 2019.3):

    Fixed in 2019.3.6f1

Comments (2)

  1. Dantorius

    May 12, 2021 15:47

    Still seeing this issue in Unity 2021.1.6.f1.

  2. Shy_

    Dec 17, 2020 07:33

    Still seeing this issue in Unity 2019.4.16f1 LTS.

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.