Policy
Turn on the display of script errors
This policy setting specifies whether to display script errors when a page does not appear properly because of problems with its scripting. This feature is off by default, but it is useful to developers when they are testing webpages. If you enable this policy setting, the user is shown script errors when a page does not appear properly because of problems with its scripting. The user cannot change this policy setting. If you disable this policy setting, the user is not shown script errors when a page does not appear properly because of problems with its scripting. The user cannot change this policy setting. If you do not configure this policy setting, the user can turn on or turn off the display of script errors.
90730bb50686 ScriptErrorCache Registry
Copy registry mappings
HKCU\Software\Policies\Microsoft\Internet Explorer\Main\Error Dlg Displayed On Every Error (enabled) = yes
HKCU\Software\Policies\Microsoft\Internet Explorer\Main\Error Dlg Displayed On Every Error (disabled) = noPolicy notes
This policy setting specifies whether to display script errors when a page does not appear properly because of problems with its scripting. This feature is off by default, but it is useful to developers when they are testing webpages. If you enable this policy setting, the user is shown script errors when a page does not appear properly because of problems with its scripting. The user cannot change this policy setting. If you disable this policy setting, the user is not shown script errors when a page does not appear properly because of problems with its scripting. The user cannot change this policy setting. If you do not configure this policy setting, the user can turn on or turn off the display of script errors.