Commented HTML

Question

In my _Layout.cshtml file, I have the following lines

<!--[if IE 7]> <link rel="stylesheet" type="text/css" media="all" href="/Content/css/ie7.css" /> <![endif]--> <!--[if IE 6]> <link rel="stylesheet" type="text/css" media="all" href="/Content/css/ie6.css" /> <![endif]--> 

Both of these lines are commented out. I always wondered, but was too afraid to ask if a code such as this was needed or not. In other words, if I use IE6 or IE7, will the corresponding line above be “activated” in any way, or just the fact that it is commented out means that it will never be called?

Answer 1

These are conditional comments .

As for HTML, they are commented out.

Internet Explorer breaks the standard to ignore comments under certain conditions (that is, when they begin with the line [unless you are some version of ie] ), so it will "activate" the code inside.

Answer 2

This is called conditional browser commentary. He will choose the stylesheet listed on the first line if you are using IE 7 and the stylesheet listed on the second line if you are using IE 6

Answer 3

Abstracts are conditional statements executed only by IE, so yes, if you use IE6 or IE7, then they will become active, that is, they will not comment.

Answer 4

These are valid conditional comments . They are subordinate to IE and do not "comment" at all. Do not delete them unless you really want to delete the behavior.