JavaScript-How does a non-flush file download like SourceForge do?

Many foreign sites in the download has this effect, click on the download to enter a guide page, there is a countdown "also xxx seconds after the start of downloading", the countdown ended without opening a new page, the browser has not turned to other pages, but directly to start the download, this is how to do.

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Many foreign sites in the download has this effect, click on the download to enter a guide page, there is a countdown "also xxx seconds after the start of downloading", the countdown ended without opening a new page, the browser has not turned to other pages, but directly to start the download, this is how to do.

It's not clear how SourceForge actually works, but the same effect can be achieved with javascript:

The countdown can be done by setTimeInterval means of a method that modifies the number of seconds remaining per second.

There are many ways to implement the download, including:

• @greatghoul the construction meta label mentioned
• The simplest:window.location.assign(url);
• Constructs a hidden iframe and sets itssrc

Just add a meta label.

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