Is your console showing an error message about an incompatible IE Document Mode?

I am encountering an issue with the following code in my jsp page.

<!--[if lt IE 7]><html lang="en" class="no-js lt-ie10 lt-ie9 lt-ie8 lt-ie7" xml:lang="en" xmlns:fb="http://www.facebook.com/2008/fbml"> <![endif]-->
<!--[if IE 7]><html lang="en" class="no-js lt-ie10 lt-ie9 lt-ie8" xml:lang="en" xmlns:fb="http://www.facebook.com/2008/fbml"> <![endif]-->
<!--[if IE 8]><html lang="en" class="no-js lt-ie10 lt-ie9" xml:lang="en" xmlns:fb="http://www.facebook.com/2008/fbml"> <![endif]-->
<!--[if IE 9]><html lang="en" class="no-js lt-ie10" xml:lang="en" xmlns:fb="http://www.facebook.com/2008/fbml"> <![endif]-->
<!--[if gt IE 9]><!--><html lang="en" class="no-js" xmlns="http://www.w3.org/1999/html" xml:lang="en" xmlns:fb="http://www.facebook.com/2008/fbml"> <!--<![endif]-->

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
    "http://www.w3.org/TR/html4/strict.dtd">
<html>

  //some code

</html>

Although this code functions correctly in IE7 and other browsers, it is causing an error in IE9 as indicated below in the IE console:

LOG : Incompatible IE Document Mode

I am seeking assistance in resolving this issue.

Thank you!

javascriptjquerycsshtml

Answer №1

It is important to note that the doctype declaration should always be included as the first line in your HTML file. Additionally, having multiple opening HTML tags within IE conditionals can lead to complications.

If you are considering cross-browser compatibility beyond just IE, it may not be ideal to wrap the HTML tag with conditionals. Other browsers will simply ignore these conditional comments, making it difficult to define specific classes for them.

An alternative approach could involve adding all necessary classes directly to the HTML tag and then selectively importing CSS files based on the version of IE being used. These CSS files can define the required classes for each browser version, such as ltIE7.css for .lt-ie7 class, ltIE8.css for .lt-ie8 class, and so on.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
    "http://www.w3.org/TR/html4/strict.dtd">
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

<html class="no-js lt-ie10 lt-ie9 lt-ie8 lt-ie7" lang="en" xml:lang="en" xmlns:fb="http://www.facebook.com/2008/fbml">
    <head>
        <!--[if lt IE 7]><link rel="stylesheet" type="text/css" href="ltIE7.css"/><![endif]-->
        <!--[if lt IE 8]><link rel="stylesheet" type="text/css" href="ltIE8.css"/><![endif]-->
        <!--[if lt IE 9]><link rel="stylesheet" type="text/css" href="ltIE9.css"/><![endif]-->
        <!--[if lt IE 10]><link rel="stylesheet" type="text/css" href="ltIE10.css"/><![endif]-->
    </head>
    <body>
        ...
    </body>
</html>

Another option, if external CSS files are not preferred, is to define the necessary classes inline using conditional comments within the head:

<style type="text/css">
    <!--[if lt IE 7]>
        .lt-ie7 {...}
    <![endif]-->
    <!--[if lt IE 8]>
        .lt-ie8 {...}
    <![endif]-->
    <!--[if lt IE 9]>
        .lt-ie9 {...}
    <![endif]-->
    <!--[if lt IE 10]>
        .lt-ie10 {...}
    <![endif]-->
</style>

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