console 命令行工具 X clear

console

function handleSelect(event) {
  document.getSelection().selectAllChildren(event.target);
}

<span id="text" ontouchend="handleSelect(event)">aaa@xxx.com</span>

<div class="outer">
   aaa@xxx.com
</div>

.outer {
  margin-top: 50px;
  padding-bottom: 50px;
}