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Use CSS Containment (again)

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Add padding to elements so content containment won't cause cropping.
Adjust the global body padding accordingly. This also exposed a
redundancy in the stylesheet, which was removed.

Now the site headers/footers, article elements (including archive
pages), <pre> elements, and other top-level elements are contained.
Rendering long-ass articles with thousands of nodes should be a little
faster.
This commit is contained in:
Rohan Kumar 2022-07-13 22:08:20 -07:00
parent 04830b7c93
commit 65130f85c2
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GPG key ID: 1E892DB2A5F84479
1 changed files with 34 additions and 26 deletions
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60
assets/css/main.css
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@ -2,16 +2,17 @@
* touch-friendly layout.
* Nothing here exists purely for aesthetics; everything addresses a
* specific a11y, compatibility, or critical
* usability need. The only exception is the h1's top margin.
* usability need.
*
* One exception: I re-set the input styles so Safari wouldn't make them
* pill-shaped.
* Two exceptions: I re-set the input styles so Safari wouldn't make
* them pill-shaped, and I tweaked some margins to make some things
* evenly aligned.
*
* I also don't use any classes except for image presentation. (e.g. to
* specify that an image should have pixelated rendering or be inverted
* in dark mode). One exception: a class for narrow width body text.
* My HTML contains microformats2 classnames for IndieWeb parsers, but I
* don't actually use those for styling.
* I also don't use any classes except to optimize embedded content.
* (e.g. to specify that an image should have pixelated rendering or be
* inverted in dark mode). One exception: a class for narrow width body
* text. My HTML contains microformats2 classnames for IndieWeb parsers,
* but I don't actually use those for styling.
*
* To keep myself from caring about minute details, I limited myself to
* only defining spacing in increments of .25em. Pixels are 1px or
@ -77,7 +78,7 @@ html {
* containing lists of interactives, with 8px in between.
* Don't use relative units here; this margin shouldn't scale with
* zoom, or else text will get narrower with zoom. */
padding: 0 24px;
padding: 0 16px;
}
/* 45em is too wide for long body text.
@ -89,6 +90,18 @@ html {
max-width: 35em;
}
/* Enable containment, especially useful for achive pages with
* long lists of content. */
body > :not(main),
main > :not(article),
article > * {
contain: content;
/* Add padding on both sides so that focus outlines don't escape their
* containers. This will let us enable CSS containment without
* clipping overflowing elements. */
padding: 0 .5em;
}
summary {
/* It's not obvious that a <summary> has button semantics.
* "cursor: pointer" is used on MDN, web.dev, GitHub, gov.uk, and
@ -137,17 +150,13 @@ html {
margin: .75em 0;
}
dt > a {
margin: -.75em 0 -.75em -.25em;
display: inline-block;
}
/* <dt> should not be closer to the previous <dd> than the following <dd>.
* That can happen in webmentions. */
dd {
padding-bottom: .25em;
}
dt > a,
aside > a {
margin: -.75em -.25em;
}
@ -155,7 +164,8 @@ html {
a[href="#h1"], /* skip link */
div[itemprop="comment"] dd > a ,
footer > nav,
/* List items with direct hyperlink children should only have one hyperlink. */
/* List items with direct hyperlink children should only have one
* hyperlink. */
li > a,
aside > a,
nav ol a {
@ -163,7 +173,8 @@ html {
display: inline-block;
}
/* The nav has to be distant-enough from the top to make room for a skip-link. */
/* The nav has to be distant-enough from the top to make room for a
* skip-link. */
header > nav {
margin: .75em 0 0 -.25em;
display: block;
@ -327,15 +338,15 @@ samp {
/* Some browsers don't support the hidden attr.
* I use hidden spans in backlinks to provide ARIA labels.
* Some ancient browsers don't support input[type="hidden"] */
span[hidden],
[hidden],
input[type="hidden"] {
display: none;
}
/* Remove list style from data feeds. */
main[itemtype="https://schema.org/DataFeed"] > ol {
padding: 0;
[itemtype="https://schema.org/DataFeed"] > ol {
list-style-type: none;
padding: 0;
}
/* Narrow screens: long words can cause content to flow out of the
@ -351,6 +362,7 @@ span[itemtype="https://schema.org/Person"] {
/* Narrow screens: allow horizontal scroll in a pre block. */
pre {
contain: content;
overflow: auto;
padding: .5em;
}
@ -390,6 +402,7 @@ div[itemprop="articleBody"] img {
max-width: 100%;
}
/* Stretch out audio elements so the progress meter is easier to use. */
audio {
width: 100%;
}
@ -415,8 +428,8 @@ form > div {
input {
/* Browsers like Safari make the submit button pill-shaped which
* clashes with the input box. The only purely-cosmetic change on this
* site. */
* clashes with the input box. One of the only purely-cosmetic changes
* on this site. */
appearance: none;
/* Don't shrink the size of the text in forms or make it system-ui. */
@ -466,11 +479,6 @@ form :focus {
}
/* Todo:
* - Some browsers don't scale SVGs properly; the img container
* dimensions crop the image rather than scale it. Investigate
* if this only applies to Internet Explorer or if it applies to
* other uncommon browsers too. If any non-IE browsers do this and/or
* if the spec allows this behavior, try to correct it here.
* - Wait till Webkit fixes its broken-ass default dark stylesheet
* then consider trimming the dark stylesheet I provide.
* */