CSS 3选择器:具有类名的第一类型?
:first-of-type
p:first-of-type {color:blue}
p.myclass1:first-of-type {color:red}
.myclass2:first-of-type {color:green}
<div>
<div>This text should appear as normal</div>
<p>This text should be blue.</p>
<p class="myclass1">This text should appear red.</p>
<p class="myclass2">This text should appear green.</p>
</div>
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