css尖角

1     .market-nav-arrow {

2             height: 0;

3             font-size: 0;

4             line-height: 0;

5             border-style: solid;

6             border-width: 7px 0px 7px 7px;

7             border-color: transparent red;

8         }
1 <div class="market-nav-arrow"></div>

效果:

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