ajax 发布上传进度 - 仅限客户端
我有一个表单，用户可以从中选择 100 个文件上传到我的服务器。
提交表单时，会向服务器发出一个可能长达数百 MB 的 POST 请求。我希望用户看到一个进度条来查看他们上传了多少。
我的问题如下：有没有办法只在客户端JS中实现这一点？我更愿意在不调用服务器上的 jsp 或 php 文件的情况下执行此操作。
我们可以使用 ext.js，但不能使用 jquery。
非常感谢，休
I have a form from which users can select 100s of files to upload to my server.
When submitting the form a post request is made to the server which may be 100s of MBs long. I would like the users see a progress bar to see how much they have uploaded.
My question is as follows: is there any way to achieve this in client side JS only? I would much prefer to do it without making a call to a jsp or php file on the server.
We can use ext.js but not jquery.
Many thanks, Hugh
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不会。标准 HTML
某些浏览器（例如 Google Chrome）会不显眼地显示
No. Standard HTML
<form>uploads don't expose their upload progress to JavaScript, so upload progress scripts have to either:Some browsers (such as Google Chrome) will unobtrusively display the progress of a
<form>upload (e.g, in the status bar), but many don't, and there's no way I'm aware of to retrieve that data from within the page.