代码示例:(标识:jsck_win_opener)
<!DOCTYPE html>
<html>
<body>

<h1>Window 对象</h1>

<h2>opener 属性</h2>

<p id="demo">
单击按钮可在 opener 窗口中打开一个写有 "HELLO!" 的新窗口。
</p>

<button onclick="myFunction()">试一试</button>

<script>
function myFunction() {
  const myWindow = window.open("", "", "width=300,height=300");
  myWindow.opener.document.getElementById("demo").innerHTML = "HELLO!";
}
</script>

</body>
</html>
运行结果: