使用
<em>
js
</em>
如果改变一篇文章字体的大小</title>
</head>
<style type="text/
<em>
css
</em>
">
a{ text-decoration:none; color:#0C3}
a:hover{ c
<div class="desc ellipsis-online ellipsis-online-1">
在页面上添加一些可以调整字号的按钮。这里采取的方法是：
以像素为单位指定body元素的font-size，然后通过相对的em单位
<em>
设置
</em>
页面中其它元素（例如p）的字号。
<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8">
<title>这是一个
<em>
设置
</em>
<em>
字体大小
</em>
的页面</title>
</head>
<script
</div>
<div class="desc ellipsis-online ellipsis-online-1">
现在需要将蓝色字体中的
<em>
字体大小
</em>
进行放大或缩小的功能，其实只需要将字体包裹在一个div中，并且
<em>
设置
</em>
id 和 默认样式style=”font-size: 17px;”，<div id="the_content" class="article-content" style="font-size: 17px;">
<p>如今，一个员工平均每天“发送+
</div>
// el - 要
<em>
设置
</em>
字体的最外层元素，size -
<em>
字体大小
</em>
，单位px
function setFontSize (el, size) {
// 获取元素el下的所有元素nodes
const nodesObj = el.getElementsByTagName("*")
const nodes = Object.values(nodesObj)
nodes.forEach(node => {
node.style.fontSize = size + "p
2、下面是
<em>
js
</em>
部分的代码，var sise = 15是声明字体初始大小为15px，这里我
<em>
设置
</em>
鼠标点击一下字体放大或缩小1px，sise++。如果想要改变变化的像素可以这样写
sise = sise + 具体数字；另外，font-sise要改为fo...
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>r.
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