PostMessage 到同一域的嵌套 iframe - JavaScript

Question

Will it be possible to send postMessage to a nested iframe?是否可以将 postMessage 发送到嵌套的 iframe？

I have parent page [ http://localhost:8765/home.html ], I have declared postMessage function in the parent page as below snippet我有父页面 [ http://localhost:8765/home.html ]，我已经在父页面中声明了 postMessage function 如下片段

// home.html [http://localhost:8765/homr.html]
<html>
<script>
    function test1(){
        document.getElementById('tableauFrame').contentWindow.postMessage("success", "*")
    }
</script>
<body>
    child ui <br>
    <iframe width='2000px' height='2000px' src='http://localhost:8766/child.html' id='tableauFrame' onload=test1()></iframe> 
</body>
</html>

Inside parent page, it will call another browser to an iframe, in child browser it has another iframe which is calling page2.在父页面中，它将调用另一个浏览器到 iframe，在子浏览器中它有另一个正在调用 page2 的 iframe。

//child.html [ http://localhost:8766/child.html ]
<html>
    <body>
        <p>Child page</p>
        <iframe src='http://localhost:8766/page2.html' id='secondary'></iframe> 
    </body>
</html>

if it was just a single iframe [ parent (home.html) to child(child.html)], it will work and receive the message, but when I tried a nested iframe parent(home.html) to grandchild[page2.html] element, it is not receiving the postMessage.如果它只是一个 iframe [父（home.html）到子（child.html）]，它将工作并接收消息，但是当我尝试嵌套 iframe 父（home.html）到孙 [page2.html ] 元素，它没有接收到 postMessage。

// grandchild [ http://localhost:8766/page2.html ]
<html>
    <script>
        window.addEventListener('message',function(message){
            if (event.origin === "http://localhost:8765") {
                console.log("displaying message from parent page : " + message.origin)
            }
        })
    </script>
    <body>
        <p>this is getting from 3rd page</p>
    </body>
</html>

Does postMessage only work on a single frame? postMessage 是否仅适用于单个帧？

Answer 1

Window messages don't "bubble down"; Window 消息不会“冒泡”； you can either:您可以：

In the grandchild page, listen to something on window.parent or even window.top , and handle all message posting on the topmost window;在孙子页面中，在window.parent甚至window.top上收听一些内容，并处理最顶层 window 上的所有消息发布； or或者
In the uppermost page, nest down twice: document.getElementById('tableauFrame').contentDocument.querySelector('iframe').contentWindow.postMessage("success", "*")在最上面的页面中，向下嵌套两次： document.getElementById('tableauFrame').contentDocument.querySelector('iframe').contentWindow.postMessage("success", "*")

PostMessage 到同一域的嵌套 iframe - JavaScript

问题描述

1 个解决方案

解决方案1
1 已采纳 2022-01-19 05:05:33

PostMessage 到同一域的嵌套 iframe - JavaScript

问题描述

1 个解决方案

解决方案1 1 已采纳 2022-01-19 05:05:33

解决方案1
1 已采纳 2022-01-19 05:05:33