Search notes:
document.compatMode
The value of the property
document.compatMode is dependent on the
rendering mode of a
web browser's layout engine. It is set to one of the following two values:
-
BackCompat (quirks mode)
-
CSS1Compat (no-quicks mode)
The following document reports compatMode to be CSS1Compat:
<!doctype html>
<p id='out'></p>
<a href='quirks.html'>Quirks mode</a>
<script> document.getElementById('out').innerText = 'document.compatMode = ' + document.compatMode; </script>
This document reports compatMode to be BackCompat:
<p id='out'></p>
<a href='no-quirks.html'>No-quirks mode</a>
<script> document.getElementById('out').innerText = 'document.compatMode = ' + document.compatMode; </script>