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css部分意见 #23

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longsp opened this issue Nov 29, 2019 · 0 comments

longsp commented Nov 29, 2019

!important使用规则
“!important”只能主动使用，不能被动使用。
我们主动命名一些公共样式时，为了保证不被意外内容覆盖，可以使用"!important", 如：

.hidden {
  display: none !important;
}

而不是被动等问题发生后，用来取巧，如:

<div class="content">
  <h2 class="heading-sub">...</h2>
</div>

.content h2 {
  font-size: 2em;
}

.heading-sub {
  font-size: 1.5em !important;
}

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