iframe通信怎么不行了
父页面
<!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>
<iframe id="iframe" src="xxxx" frameborder="0" scrolling="no"></iframe>
<script>
const iframe=document.getElementById('iframe').contentWindow
iframe.postMessage('getIframeHeight','*')
window.addEventListener('message',function(e){
console.log(e.data,'e.data');
})
</script>
</body>
</html>
iframe页面
<script>
window.addEventListener('message', function(e) {
if(e.data=='getIframeHeight'){
console.log('getIframeHeight');
}
});
</script>
但是打印不出来信息咋回事,src确实是目标iframe，先不管通配符，iframe打印不出来东西
