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    document.compatMode Redirect 1

    « DOM Reference

    Summary

    Indicates whether the document is rendered in Quirks mode or Strict mode.

    Syntax

    mode = document.compatMode 
    
    • mode is the string "BackCompat" for Quirks mode or "CSS1Compat" for Strict mode.

    Example

    if (document.compatMode == "BackCompat") {
      // in Quirks mode
    }
    

    Notes

    There is a third mode, Gecko's "Almost Standards" Mode, which only differs from Strict mode in the layout of images inside table cells. This third mode is reported the same way as Strict mode: "CSS1Compat".

    Specification

    Document Tags and Contributors

    Contributors to this page: Sheppy
    Last updated by: Sheppy,
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