in-viewport?

[vvo]

Hi I made https://github.com/vvo/in-viewport.

Have you seen it? considering using it? if not, why? (so I can make it better)

its the base building block of my lazyload script used on hundreds of websites serving million page views.

thanks @juliangruber

[juliangruber]

i don't remember the exact reasons, i think i discovered your module after i got the first version of this working. it didn't let you abort the watch mode and the implementation is a lot more complex.

any other thoughts, @micnews/owners?

[vvo]

Oh yeah there are a lot of cases I had to deal with + some libraries are inlined:

• debounce is inlined
• addEventlistener old API
• indexOf
• use of mutation observer to detect watched dom nodes being inserted while no scroll event trigered (otherwise = no watch event)
• use of contains method otherwise calling getBoundingClientRect will throw on detached dom nodes
• being able to use a custom container for the viewport (like a scrollable div instead of the whole document)

I agree this complexifies the library so it's all up to you. in-viewport was built as a solution to the https://github.com/vvo/lazyload library. This is part of an automatic web perfomance optimizer reverse proxy: http://www.fasterize.com/en

Being able to unwatch would be a good addition even if no one ever asked for it.

Everything is tested.

Thanks !