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JScript issues with Win11 24H2: per-application "JScriptReplacement"?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(3.2, 61%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDC%3C/text%3E%3C/svg%3E)
Davide Capodaglio
5
Reputation points
After Windows11 24H2, there are many compatibility issues with JScript engine as reported in other threads.
There is a known workaround in the registry (per system or per user) using the JScriptReplacement=0.
But, is there a per-application workaround without messing the registry, that is not always acceptable?
Can an application opt-in to use the old engine explicitly?
Thanks
Microsoft 365 and Office | Development | Office JavaScript API
Windows for business | Windows Client for IT Pros | User experience | Other
{count} vote
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Davide Capodaglio 5 Reputation points
2025-02-19T13:18:38.67+00:00 nobody here?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(243.2, 54%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKM%3C/text%3E%3C/svg%3E)
Kestutis Mitkus 1 Reputation point2025-06-10T14:50:39.0433333+00:00 We were facing the same problem and used this JScriptReplacement workaround, but later after upgrading our testing application, which was using JScript tests, this workaround caused object recognition issues, where objects that appear after a delay are not detected, leading to test failures. We are stuck with older application version because of this issue and can't upgrade to latest version with various fixes.
Any suggestion how to solve this issue?
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