window.clipboardData can realize copy and paste operations, its getData method can realize data reading, and the setData method can realize data setting
<script language="javascript">
function readTxt()
{
alert(window.clipboardData.getData("text"));
}
function setTxt()
{
var t=document.getElementById("txt");
t.select();
window.clipboardData.setData('text',t.createTextRange().text);
}
</script>
<input name="txt" value="测试">
<input type="button" value="复制" onclick="setTxt()">
<input type="button" value="读取" onclick="readTxt()">
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
