[英]javascript - get data from an element within an iframe
I've got this <iFrame>
[name="data"] with a page displaying a <span>
, with id="weergave_percentage". 我有一个
<iFrame>
[name =“data”],页面显示<span>
,id =“weergave_percentage”。 I want to get the numbers from that span into a javascript function. 我希望将该范围内的数字转换为javascript函数。 I currently made this, but it returns: null
我目前做了这个,但它返回:null
var percentage = window.frames['data'].document.getElementById('weergave_percentage');
alert(percentage);
What am I doing wrong and how can I do what I want? 我做错了什么,我怎么能做我想做的事?
Note: the span containing the data, only contains numbers (float), and no other HTML formatting of any kind. 注意:包含数据的范围仅包含数字(浮点数),并且不包含任何其他类型的HTML格式。 Also, I've put the piece of javascript after the code for the iFrame, to make sure the iFrame is loaded when I try to get the data from the iFrame.
另外,我在iFrame的代码之后添加了一段javascript,以确保在我尝试从iFrame获取数据时加载了iFrame。 Also, the iFrame's src is on the same domain as the main page.
此外,iFrame的src与主页面位于同一个域中。
If iframe src links to other domain than the one your pages is displayed from - then you can't get that data (browsers prevernt cross-site scripting). 如果iframe src链接到显示您的页面之外的其他域 - 那么您将无法获取该数据(浏览器会提供跨站点脚本)。
Other than that - this could should work: 除此之外 - 这可能会起作用:
$('iframe').contents().find('#weergave_percentage').html();
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.