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d4nyll / smartscroll

jQuery plugin for scrolljacking and auto-hashing
https://d4nyll.github.io/smartscroll/
MIT License
257 stars 45 forks source link

Scrolling by sections with the scrollbar #56

Open francetus opened 5 years ago

francetus commented 5 years ago

Hello ! Thank you for this library !

I'd like to scroll section by section also with the scroll bar. Any idea how I could do this ?

Thanks!

d4nyll commented 5 years ago

Hi @francetus would you be able to clarify what you mean? In this demo you should be able to see the scrollbar on the right-hand side.

francetus commented 5 years ago

Hello @d4nyll Sorry for beeing unclear ^^ I mean, when we use the srcollbar manuallly, the page scroll also by sections, like with the mouswheel. If you drag/drop the scrollbar, the page stops automatically at the top of the next section. If you drop the scrollbar at the middle of a section, the scrollbar will adjusts automatically.

It will be easier to explain with an example. You can see what I mean here with the plugin Scrollify: https://projects.lukehaas.me/scrollify/

thank you :)

d4nyll commented 5 years ago

Thanks for clarifying. Unfortunately, that feature isn't supported in smartscroll, and I won't be adding it in the future.

However, if you have the time to invest into modifying the code, feel free to submit a PR. It shouldn't be too hard, here are the steps I would take:

  1. Add a new option, perhaps call it snap
  2. Create a function that detects which section the middle of the screen is touching, get the offset from the top, and run scrollToPixel with that offset.
  3. Add a new if statement in the code (e.g. if (options.snap === true)) and in it bind the function defined in (2) to a manual scroll event.