px~em~pt转换表
em的计算是相对的。
1、代码
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>em演示</title><style type="text/css">p {font-size: 3em;}div {font-size: 2em;}</style></head><body><p>I love you. ~3em</p><div>I love you. ~2em<p>I love you. ~6em</p></div></body></html>
2、效果3、解释
