javascript - How this site shows a neat HTML box before you leave -

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on site: http://shirtjs.com/product-category/collections/zeptojs/

when move cursor out of html page (about go close tab) show "wait before leave!" modal centered div.

tldr:

this doesn't occur if 'leave' html page through sides or bottom of browser window.

is common js library, custom made, ...

there's 2,000,000 libraries loaded on site! haven't been able trace js code bottom of this.

any idea how it?

found it:

ouibounce lib.

https://github.com/carlsednaoui/ouibounce

thanks efforts :)


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