Hi @S-Soft ,
How does Internet Explorer determine the document mode
The <!DOCTYPE> declaration determines whether the webpage renders some specific Quirks mode emulation (QME) behavior that is specified in the MS-HTML5 and MS-CSS21 documentation.
Based on your description, 11000 (0x2AF8) is better.
Since IE11 is no longer supported, there may be compatibility issues.
Best Regards.
Jiachen Li
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