CodePen Embed - 【CSS】解析七種常見的相對單位：rem

Live

 
<div class="container">
    容器文字大小為 24px
    <div class="child">子元素文字大小為 32px</div>
</div>

Live

​x
 
/* 根元素 font-size 預設 16px */
.container {
    font-size: 1.5rem; /* 1.5 * 16px = 24px */
}
.child {
    font-size: 2rem; /* 2 * 16px = 32px */
}
​

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