electron_learn_demo
/
popup_page.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h2>我是弹出子窗口</h2>
    <button id="popBtn" >向窗口传递信息</button>
</body>
<script>
    var popBtn = this.document.querySelector('#popBtn')
    popBtn.onclick = function(e){
        //window.opener.postMessage 子窗口向父窗口传递消息
        window.opener.postMessage('我是子窗口的消息') //向所有父窗口传递
    }
</script>
</html>