javascript - Sticky header that is transparent over main banner? -

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i've built client's site on squarespace.

i want create header that:

1) has transparent background when user first arrives on page 2) when user scrolls down, gets background color , remains affixed top of viewport.

thanks!

some info

csstricks have great little example on how (this common solution this).

the basics solution listen scroll event , check when right spot (you can calculate spot programmatically if want). if do, add class header following:

  • makes header colored wanted be

  • make header position: fixed; top: <num>; or position: absolute; top: <num> (i've seen both solutions out in field)

    !important! position:absolute solution less safe, since position: fixed positions element relative viewport. position:absolute same only if doesn't have predecessor position:relative [for more info, check this link ]

there's experimental css feature position add position: sticky option. in theory, sticky part [you can see it's experimental experimental badge next on mdn].

the actual solution

https://css-tricks.com/scroll-fix-content/

it includes demo code on codepen.io. notice need scroll view box (class="wrap") , not page itself.


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