Page crash when CSS mask-image uses Custom Properties

Confirmed Issue #15415089 • Assigned to wptcomptri


Jan 11, 2018
This issue is public.
Found in
  • Microsoft Edge
Found in build #
Reported by 3 people

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Steps to reproduce

When a site’s CSS has a mask-image that uses a Custom Property such as:

div {
  --mask: initial;
  mask-image: var(--mask);

The page won’t load and displays the message “This page is having a problem loading.”


Possibly related to clip-path issue


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    Comments and activity

    • Microsoft Edge Team

      Changed Status to “Confirmed”

    • Thank you for your report! I assume this currently only reproduces in inside builds, correct? I’ll redirect you to the appropriate team, and they will take it from there.

    • Microsoft Edge Team

      Changed Assigned To to “wptcomptri”

    • It can be seen on latest external Edge release too.

    • Microsoft Edge Team

      Changed Status from “Confirmed”

      Changed Status to “Confirmed”

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