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JavaScriptJitAllowedForSites

  • Article

Allow JavaScript to use JIT on these sites

Supported versions

  • On Windows and macOS since 93 or later

Description

Allows you to set a list of site url patterns that specify sites which are allowed to run JavaScript with JIT (Just In Time) compiler enabled.

For detailed information on valid site url patterns, please see https://go.microsoft.com/fwlink/?linkid=2095322. Wildcards, *, are allowed.

JavaScript JIT policy exceptions will only be enforced at a site granularity (eTLD+1). A policy set for only subdomain.contoso.com will not correctly apply to contoso.com or subdomain.contoso.com since they both resolve to the same eTLD+1 (contoso.com) for which there is no policy. In this case, policy must be set on contoso.com to apply correctly for both contoso.com and subdomain.contoso.com.

This policy applies on a frame-by-frame basis and not based on top level origin url alone, so e.g. if contoso.com is listed in the JavaScriptJitAllowedForSites policy but contoso.com loads a frame containing fabrikam.com then contoso.com will have JavaScript JIT enabled, but fabrikam.com will use the policy from DefaultJavaScriptJitSetting, if set, or default to JavaScript JIT enabled.

If you don't configure this policy for a site then the policy from DefaultJavaScriptJitSetting applies to the site, if set, otherwise Javascript JIT is enabled for the site.

Supported features

  • Can be mandatory: Yes
  • Can be recommended: No
  • Dynamic Policy Refresh: Yes
  • Per Profile: Yes
  • Applies to a profile that is signed in with a Microsoft account: No

Data type

  • List of strings

Windows information and settings

Group Policy (ADMX) info

  • GP unique name: JavaScriptJitAllowedForSites
  • GP name: Allow JavaScript to use JIT on these sites
  • GP path (Mandatory): Administrative Templates/Microsoft Edge/Content settings
  • GP path (Recommended): N/A
  • GP ADMX file name: MSEdge.admx

Example value

[*.]example.edu

Registry settings

  • Path (Mandatory): SOFTWARE\Policies\Microsoft\Edge\JavaScriptJitAllowedForSites
  • Path (Recommended): N/A
  • Value name: 1, 2, 3, ...
  • Value type: List of REG_SZ

Example registry value

SOFTWARE\Policies\Microsoft\Edge\JavaScriptJitAllowedForSites\1 =

[*.]example.edu

Mac information and settings

  • Preference Key name: JavaScriptJitAllowedForSites
  • Example value:
<array>
  <string>[*.]example.edu</string>
</array>

See also