[英]Download large PDF in javascript
I have a website which hosts large PDF documents, as well as some other file formats.我有一个托管大型 PDF 文档以及其他一些文件格式的网站。
How can I open up a download-dialog box in javascript so that the user can save the document to their computer?如何在 javascript 中打开下载对话框,以便用户可以将文档保存到他们的计算机?
PDF always needs download (even for iframe / embed /object ) so do not use those as its then potential double overload on server, once to downlink and show then potentially a second time by the scripting (However if user selects the "save download as" button in viewer the download should be just once) PDF 总是需要下载(即使对于 iframe / embed /object ),所以不要将它们用作服务器上潜在的双重过载,一次下行并通过脚本显示可能第二次(但是如果用户选择“另存为“查看器中的按钮下载应该只是一次)
The answer is display a small image or icon to show the download content, then back that up with答案是显示一个小图像或图标来显示下载内容,然后用
<a href="file.pdf" download="filename.pdf"><Img src="cover.png"></a>
something like this:-像这样的东西: -
<a href="https://africau.edu/images/default/sample.pdf" download="A Sample.pdf"><img src="https://www.freeiconspng.com/uploads/download-pdf-icon-png-icon-29.png" width="128" height="128"><a><br>right click icon to chose download options
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