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CSS Guides Layout Module

Just some random sketches of how Guides Layout could look in CSS. Clean af that is. This is the layout module you'd want for scrolling websites. It has built-in support for parallax and pinning (imagine native browser support with these as first-class citizens).

One thing that Scrollmeister also has that we still cannot do in CSS is having the height defined as a ratio. E.g. having an element that is always 16:9. This is trivial to implement inside the Guides Layout, because the width is always well defined by the guides. It is not something that can be solved in a general purpose way, but inside of Guides Layout height: 16 / 9 should just work. Or maybe allow unit-less numbers to make parsing backwards-compatible, e.g. height: 0.5625 (9 divided by 16).

Linear document flow

.a, .b and .c will all be displayed below each other. If they have margin-top/bottom it is respected.

<div class="container">
	<div class="a"></div>
	<div class="b"></div>
	<div class="c"></div>
</div>
.container {
	display: guides;
	guides-template: left 0 2vmin, center 50%, right 100% 2vmin;
}

.a {
	guides-snap: left center;
}

.b {
	guides-snap: left right;
}

.c {
	guides-snap: viewport;
}

Break the flow (skip)

.b and .c will be displayed below .a, because .c skips .b.

<div class="container">
	<div class="a"></div>
	<div class="b"></div>
	<div class="c"></div>
</div>
.container {
	display: guides;
	guides-template: left 0 2vmin, center 50% 10px, right 100% 2vmin;
}

.a {
	guides-snap: viewport;
}

.b {
	guides-snap: left center;
}

.c {
	guides-snap: center right;
	guides-dependencies: skip 1;
}

Follow multiple elements without a wrapper (consume)

.d will be below .b and .c, whichever is higher, because .d consumes two elements.

<div class="container">
	<div class="a"></div>
	<div class="b"></div>
	<div class="c"></div>
	<div class="d"></div>
</div>
.container {
	display: guides;
	guides-template: left 0 2vmin, center 50% 10px, right 100% 2vmin;
}

.a {
	guides-snap: viewport;
}

.b {
	guides-snap: left center;
}

.c {
	guides-snap: center right;
}

.d {
	guides-snap: left right;
	guides-dependencies: consume 2;
}

Parallax

.follower will move in a parallax motion with .leader in a way such that their top is aligned when they enter the viewport (from the bottom) and their bottoms are aligned when they leave the viewport (at the top).

<div class="container">
	<div class="leader">some long text</div>
	<div class="follower">some image</div>
</div>
.container {
	display: guides;
	guides-template: left 0 2vmin, center 50% 10px, right 100% 2vmin;
}

.leader {
	guides-snap: left center;
}

.follower {
	guides-snap: center right;
	guides-mode: follow parallax;
}

Pinning alongside a longer element

.image will be pinned alongside .text. It will enter the viewport with .text (both tops are aligned), the pin at the center of the viewport until it leaves with .text (bottoms aligned).

<div class="container">
	<div class="text">...tons of lorem ipsum...</div>
	<img class="image" src="my-meme-collection/0081295.jpg">
</div>
.container {
	display: guides;
	guides-template: left 0 2vmin, center 50% 10px, right 100% 2vmin;
}

.text {
	guides-snap: left center;
}

.image {
	guides-snap: center right;
	guides-mode: follow pin center;
}

Right-aligned guide

Using a negative position the offset is calculated from the right. So if you want a right column that is always 200px you could do calc(100% - 200px) or just do -200px.

.container {
	display: guides;
	guides-template: sidebar -200px;
}
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