Layout Mode Test

The doctype used on this page is <!DOCTYPE HTML PUBLIC "ISO/IEC 15445:1999//DTD HTML//EN">

This page has no X-UA-Compatible meta element.

This page has no X-UA-Compatible HTTP header.

Note: Be sure to observe the test that is applicable to the browser you are using.

Interoperable Quirks test (not applicable to old Opera, old Safari Mac IE 5 or Windows IE 6 or 7)

The browser is in the Standards or Almost standards Quirks mode.

Quirk reference

Test

Standard reference

Standards if the blue rectangles are a couple of pixels taller than a line of text. Almost standards or quirks if the rectangles are 3px tall.

The browser is not in the Standards or Almost Standards mode. It is in the Quirks mode.

The compatibility view is enabled.

If diamond below, the mode is at least IE9 mode

If diamond below, the mode is at least IE10 mode

Red if quirks

Doctype:
X-UA-Compatible Header IE value:
X-UA-Compatible Meta IE value:
Insert script before X-UA-Compatible Meta:
Chrome Frame header:
Chrome Frame meta: