When there is a float in the child element of li, a 4px gap bug will occur under the
The code is as follows:
<ul class="list"> <li><div>vapour</div></li> <li><div>百度</div></li> <li><div>淘宝</div></li> <li><div>迅雷</div></li> </ul>
After testing, it was found that the floating sub-element of li is a necessary condition for the occurrence of this bug. The necessary and sufficient condition for the occurrence of this bug is that the sub-element of li is floating and li has one of the following CSS attributes set: width, height, zoom, padding -top, padding-bottom, margin-top, margin-bottom.
Now that we know the conditions for this bug, we have a solution:
Method 1:
#list div sets clear:left|both, then #list li cannot set width, height, zoom.
Method 2:
#list li sets float:left. At this time, #list li can set width, height, and zoom.
#list li sets clear:left|both. At this time, #list li cannot set width, height, and zoom.
Method 3:
This bug in IE6/IE7 can be solved by setting vertical-align:top|middle|bottom to the div in li. It's too weird, just add that the value of vertical-align is one of the three.
The code is as follows:
<span style="color: #0000ff;">DOCTYPE html<span style="color: #0000ff;">>
<span style="color: #0000ff;">html<span style="color: #0000ff;">>
<span style="color: #0000ff;">head<span style="color: #0000ff;">>
<span style="color: #0000ff;">meta <span style="color: #ff0000;">charset<span style="color: #0000ff;">="gb2312" <span style="color: #0000ff;">/>
<span style="color: #0000ff;">title<span style="color: #0000ff;">>IE6/IE7中li底部3px的Bug<span style="color: #0000ff;"><span style="color: #800000;">title<span style="color: #0000ff;">>
<span style="color: #0000ff;">style <span style="color: #ff0000;">type<span style="color: #0000ff;">="text/css"<span style="color: #0000ff;">><span style="color: #800000;">
ul <span style="color: #000000;">{<span style="color: #ff0000;"> margin<span style="color: #000000;">:<span style="color: #0000ff;"> 0<span style="color: #000000;">;<span style="color: #ff0000;"> padding<span style="color: #000000;">:<span style="color: #0000ff;"> 0<span style="color: #000000;">;<span style="color: #ff0000;"> list-style<span style="color: #000000;">:<span style="color: #0000ff;"> none<span style="color: #000000;">; <span style="color: #000000;">}<span style="color: #800000;">
hr <span style="color: #000000;">{<span style="color: #ff0000;"> clear<span style="color: #000000;">:<span style="color: #0000ff;"> both<span style="color: #000000;">; <span style="color: #000000;">}<span style="color: #800000;">
.list li <span style="color: #000000;">{<span style="color: #ff0000;"> width<span style="color: #000000;">:<span style="color: #0000ff;"> 420px<span style="color: #000000;">; <span style="color: #000000;">}<span style="color: #800000;">
.list div <span style="color: #000000;">{<span style="color: #ff0000;"> float<span style="color: #000000;">:<span style="color: #0000ff;"> left<span style="color: #000000;">;<span style="color: #ff0000;"> width<span style="color: #000000;">:<span style="color: #0000ff;"> 400px<span style="color: #000000;">;<span style="color: #ff0000;"> height<span style="color: #000000;">:<span style="color: #0000ff;"> 24px<span style="color: #000000;">;<span style="color: #ff0000;"> background<span style="color: #000000;">:<span style="color: #0000ff;"> red<span style="color: #000000;">; <span style="color: #000000;">}<span style="color: #800000;">
.v-top div <span style="color: #000000;">{<span style="color: #ff0000;"> vertical-align<span style="color: #000000;">:<span style="color: #0000ff;"> top<span style="color: #000000;">; <span style="color: #000000;">}<span style="color: #800000;">
.v-middle div <span style="color: #000000;">{<span style="color: #ff0000;"> vertical-align<span style="color: #000000;">:<span style="color: #0000ff;"> middle<span style="color: #000000;">; <span style="color: #000000;">}<span style="color: #800000;">
.v-bottom div <span style="color: #000000;">{<span style="color: #ff0000;"> vertical-align<span style="color: #000000;">:<span style="color: #0000ff;"> bottom<span style="color: #000000;">; <span style="color: #000000;">}
<span style="color: #0000ff;"><span style="color: #800000;">style<span style="color: #0000ff;">>
<span style="color: #0000ff;"><span style="color: #800000;">head<span style="color: #0000ff;">>
<span style="color: #0000ff;">body<span style="color: #0000ff;">>
<span style="color: #0000ff;">ul <span style="color: #ff0000;">class<span style="color: #0000ff;">="list"<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>vapour<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>百度<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>淘宝<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>迅雷<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li<span style="color: #0000ff;">>
<span style="color: #0000ff;"><span style="color: #800000;">ul<span style="color: #0000ff;">>
<span style="color: #0000ff;">hr <span style="color: #0000ff;">/>
<span style="color: #0000ff;">ul <span style="color: #ff0000;">class<span style="color: #0000ff;">="list v-top"<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>vapour<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>百度<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>淘宝<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li<span style="color: #0000ff;">>
<span style="color: #0000ff;">li<span style="color: #0000ff;">>div<span style="color: #0000ff;">>迅雷<span style="color: #0000ff;"><span style="color: #800000;">div<span style="color: #0000ff;">><span style="color: #800000;">li>
<hr>
<ul class="list v-middle">
<li><div>vapour</div></li>
<li><div>百度</div></li>
<li><div>淘宝</div></li>
<li><div>迅雷</div></li>
</ul>
<hr>
<ul class="list v-bottom">
<li><div>vapour</div></li>
<li><div>百度</div></li>
<li><div>淘宝</div></li>
<li><div>迅雷</div></li>
</ul>
</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
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