HTMLIFrameElement.contentWindow - Web API 接口参考 编辑

contentWindow 属性返回当前HTMLIFrameElement的Window对象. 你可以使用这个Window 对象去访问这个iframe的文档和它内部的DOM. 这个是可读属性, 但是它的属性像全局Window 一样是可以操作的. 

关于contentWindow的示例

var x = document.getElementsByTagName("iframe")[0].contentWindow;
//x = window.frames[0];

x.document.getElementsByTagName("body")[0].style.backgroundColor = "blue";
// this would turn the 1st iframe in document blue.

 规范

Specification	Status	Comment
HTML Living Standard HTMLIFrameElement: contentWindow	Living Standard

浏览器兼容性

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