CSS实现“三角形箭头”布局的一些实例代码

2020-01-27 14:20:25

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CSS实现“三角形箭头”布局的一些实例代码，我想搞CSS的朋友都知道这个吧？在几年前还必须用图片实现的东西，现在用CSS就搞定了，不得不羡慕作者对CSS的执着。不过这绝对是一个好用的CSS技巧，使用它可有效减少因使用图片给页面带来的影响，有效提升网页加载性能。

<html><head><mce:style type="text/css"></mce:style><style  type="text/css" _mce_bogus="1"></style></head><body><div style="padding: 40px; background:#fff;" _mce_style="padding: 40px; background: #fff;"><div class="wp"><span class="arrow"></span>“三角形箭头”例1</div><div style="position: relative; background: red; padding: 20px; color: #fff; margin-bottom: 30px;" _mce_style="position: relative; background: red; padding: 20px; color: #fff; margin-bottom: 30px;"><span style="position: absolute; left: 30px; top: -32px; width: 0; height: 0; font-size: 0; border-width: 16px; border-style: dashed dashed solid dashed; border-color: transparent transparent red transparent;" _mce_style="position: absolute; left: 30px; top: -32px; width: 0; height: 0; font-size: 0; border: 16px dashed dashed solid dashed transparent transparent red transparent;"></span>“三角形箭头”例1</div><div style="position: relative; border: 4px solid red; padding: 20px; margin-bottom: 30px;" _mce_style="position: relative; border: 4px solid red; padding: 20px; margin-bottom: 30px;"><span style="position: absolute; left: 30px; top: -32px; width: 0; height: 0; font-size: 0; border-width: 16px; border-style: dashed dashed solid dashed; border-color: transparent transparent red transparent;" _mce_style="position: absolute; left: 30px; top: -32px; width: 0; height: 0; font-size: 0; border: 16px dashed dashed solid dashed transparent transparent red transparent;"></span><span style="position: absolute; left: 30px; top: -27px; width: 0; height: 0; font-size: 0; border-width: 16px; border-style: dashed dashed solid dashed; border-color: transparent transparent #FFF transparent;" _mce_style="position: absolute; left: 30px; top: -27px; width: 0; height: 0; font-size: 0; border: 16px dashed dashed solid dashed transparent transparent #FFF transparent;"></span>“三角形箭头”例2</div><div style="position: relative; background: red; padding: 20px; color: #fff; margin-bottom: 30px;" _mce_style="position: relative; background: red; padding: 20px; color: #fff; margin-bottom: 30px;">	<span style="position: absolute; left: 30px; top: -16px; width: 0; height: 0; font-size: 0; border-width: 16px; border-style: dashed dashed dashed solid; border-color: transparent transparent transparent red;" _mce_style="position: absolute; left: 30px; top: -16px; width: 0; height: 0; font-size: 0; border: 16px dashed dashed dashed solid transparent transparent transparent red;"></span>“三角形箭头”例3</div><div style="position: relative; background: red; padding: 20px; color: #fff; margin-bottom: 30px;" _mce_style="position: relative; background: red; padding: 20px; color: #fff; margin-bottom: 30px;"><span style="position: absolute; left: 30px; top: -16px; width: 0; height: 0; font-size: 0; border-width: 16px 24px; border-style: dashed dashed dashed solid; border-color: transparent transparent transparent red;" _mce_style="position: absolute; left: 30px; top: -16px; width: 0; height: 0; font-size: 0; border: 16px 24px dashed dashed dashed solid transparent transparent transparent red;"></span><span style="position: absolute; left: 14px; top: -32px; width: 0; height: 0; font-size: 0; border-width: 16px; border-style: dashed dashed solid dashed; border-color: transparent transparent #fff transparent;" _mce_style="position: absolute; left: 14px; top: -32px; width: 0; height: 0; font-size: 0; border: 16px dashed dashed solid dashed transparent transparent #fff transparent;"></span>“三角形箭头”例4</div><div style="position: relative; background: red; width: 160px; padding: 20px; color: #fff; margin-bottom: 30px;" _mce_style="position: relative; background: red; width: 160px; padding: 20px; color: #fff; margin-bottom: 30px;">	<span style="position: absolute; left: 0px; top: -12px; width: 188px; height: 0; font-size: 0; border-width: 6px; border-style: dashed dashed solid dashed; border-color: transparent transparent red transparent;" _mce_style="position: absolute; left: 0px; top: -12px; width: 188px; height: 0; font-size: 0; border: 6px dashed dashed solid dashed transparent transparent red transparent;"></span>模拟梯形边<span style="position: absolute; left: 0px; bottom: -12px; width: 188px; height: 0; font-size: 0; border-width: 6px; border-style: solid dashed dashed dashed; border-color: red transparent transparent transparent;" _mce_style="position: absolute; left: 0px; bottom: -12px; width: 188px; height: 0; font-size: 0; border: 6px solid dashed dashed dashed red transparent transparent transparent;"></span></div><h2>看看这个例子就会明白所谓“三角边”了</h2><div style="border-width:40px;border-style:solid;border-color:red green black blue;line-height:0;font-size:0;overflow:hidden;width:100px;height:0" _mce_style="line-height: 0; font-size: 0; overflow: hidden; width: 100px; height: 0; border: 40px solid red green black blue;"></div><h2>把某些边透明掉就可以模拟三角形了，注意ie6下透明的边要是dotted或dashed</h2><div style="border-width:40px;border-style:dashed dashed solid dashed;border-color:transparent transparent red transparent;line-height:0;font-size:0;width:0;height:0" _mce_style="line-height: 0; font-size: 0; width: 0; height: 0; border: 40px dashed dashed solid dashed transparent transparent red transparent;"></div><div style="border-width:40px;border-style:dashed solid solid dashed;border-color:transparent blue red transparent;line-height:0;font-size:0;width:0;height:0" _mce_style="line-height: 0; font-size: 0; width: 0; height: 0; border: 40px dashed solid solid dashed transparent blue red transparent;"></div></div></body></html>

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