SOURCE

console 命令行工具 X clear

                    
>
console
<div id="btn1">
  按钮1
</div>
<br />
<button id="btn2">
  按钮2
</button>
#btn1 {
  background:#f0f0f0;
  width: 50px;
  height: 24px;
  font-size: 13.333px;
  border: 1px solid black;
}
// 稍微有些简单哈