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[6.x] Anchor positioned nav marker #13536

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Merged
jasonvarga merged 5 commits into from
Jan 13, 2026
+61 −18
Merged

[6.x] Anchor positioned nav marker #13536

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1f8dd0d
Get anchor positioning working
JayGeorge Jan 13, 2026
c3900d3
Fix selector
JayGeorge Jan 13, 2026
170a30e
Tidy
JayGeorge Jan 13, 2026
1188a83
Make it a little swifter
JayGeorge Jan 13, 2026
e55fe91
Tweak
JayGeorge Jan 13, 2026
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79 changes: 61 additions & 18 deletions resources/css/core/layout.css
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Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
/* ==========================================================================
THE MAIN NAV (LEFT SIDEBAR)
========================================================================== */
/* GROUP THE MAIN NAV (LEFT SIDEBAR)
=================================================== */
.nav-main {
@apply flex flex-col gap-6 py-6 px-2 sm:px-3 text-sm antialiased select-none;
/* Same as the main element, accounting for the header with a class of h-14, which is the same as 3.5rem */
Expand Down Expand Up @@ -39,36 +38,80 @@
ul li ul li a.active {
@apply text-gray-925 dark:text-white font-medium bg-transparent;
}
ul li ul li {
a.active {
/* [1] Add a little vertical line to indicate the "active" subnav item */

.section-title {
@apply text-sm px-2 text-gray-925 font-medium mb-1 dark:text-gray-200;
}
}

/* GROUP THE MAIN NAV (LEFT SIDEBAR) / ACTIVE STATES
=================================================== */
.nav-main {
@supports not (anchor-name: --my-anchor) {
ul li ul li {
a.active {
/* [1] Add a little vertical line to indicate the "active" subnav item */
&::before {
content: '';
position: absolute;
left: -1px;
@apply h-4 border-s border-s-black;
}
:where(.dark) &::before {
@apply border-s-gray-400;
}
}
&:only-child a.active {
/* [/2] Make the "active" subnav item less distracting for single-subnav items such as Assets/assets */
&::before {
@apply border-s-gray-400;
}
:where(.dark) &::before {
@apply border-s-gray-500;
}
}
}
}

@supports (anchor-name: --my-anchor) {
ul ul:has(.active) {
/* [1] Add a little vertical line to indicate the "active" subnav item that moves with anchor positioning */
&::before {
content: '';
position: absolute;
left: -1px;
width: anchor-size(height);
height: anchor-size(height);
@apply h-4 border-s border-s-black;
translate: -100% 0;
position-anchor: --active;
left: calc(anchor(left) + 0.25rem);
top: anchor(top);
transition-property: top, left;
transition-duration: 0.2s;
transition-timing-function: cubic-bezier(0.215, 0.610, 0.355, 1);
}
:where(.dark) &::before {
@apply border-s-gray-400;
}
}
&:only-child a.active {
/* [/2] Make the "active" subnav item less distracting for single-subnav items such as Assets/assets */
&::before {
@apply border-s-gray-400;
&:has(li:only-child) {
/* [/2] Make the "active" subnav item less distracting for single-subnav items such as Assets/assets */
&::before {
@apply border-s-gray-400;
}
:where(.dark) &::before {
@apply border-s-gray-500;
}
}
:where(.dark) &::before {
@apply border-s-gray-500;
a.active {
anchor-name: --active;
}
}
}

.section-title {
@apply text-sm px-2 text-gray-925 font-medium mb-1 dark:text-gray-200;
}
}




/* Mobile nav behavior */
@media (width < theme(--breakpoint-lg)) {
.nav-main {
Expand Down