Conditional comments in HTML

Previous words

IE conditional comments are a non-standard logical statement provided by Microsoft since IE5. Its function is to flexibly import different HTML elements for different IE versions of browsers. Obviously, the biggest advantage of this method is that it is a compatible solution officially given by Microsoft and can also identify IE

through W3C verification

Because starting from IE10, the IE browser no longer Conditional comments are now supported. Therefore, the following writing method can only recognize IE9-browser

[Note] There must be no space between the two -- and the left bracket [, otherwise it will be invalid

<!--[if IE]>
<p class="box" id="box"></p>
<![endif]-->

Recognizes a single IE

6    [if IE 6]
7    [if IE 7]
8    [if IE 8]
9    [if IE 9]

<!--[if IE 7]>
<p class="box" id="box"></p>
<![endif]-->

Identification range IE

gt        　大于
gte     　　 大于等于 
lt          小于 
lte         小于等于

<!--[if lte IE 7]>
<p class="box" id="box"></p>
<![endif]-->

Identification of non-IE

Actually recognizes IE10+ browsers and other non-IE browsers

-[if !IE]>
<p class="box" id="box"></p>
<![endif]-->

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