iframe use (can be merged)

One: Manipulate DOM across iframes

window.parent.document.getElementById('id').style.zIndex = '100';

If the domain names of the two iframes are different, an error will be reported

Two: Pass parameters across iframes

1. The child iframe passes parameters to the parent

// 子iframe，发送方：
window.postMessage("hello", "http://localhost:8081"); 

// 父iframe, 接收方：
window.addEventListener( "message",
(e)=>{console.log(e.data)}	
false);

2. Pass values ​​from the parent iframe to the child iframe

直接在iframe的src数属性中拼接上参数

// 发送方：
<div>
    <iframe :src="url" id="childFrame" importance="high" name="demo" ></iframe>
</div>

url = `http://localhost:8080/couponManager?a={a}` //  

接收方：直接使用window.location.search接收，然后对接收到的进行处理