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Improvement to scroll-to-top component #4338

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Jan 13, 2025
Merged

Improvement to scroll-to-top component #4338

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35 changes: 28 additions & 7 deletions hypha/core/templates/components/scroll-to-top.html
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Original file line number Diff line number Diff line change
@@ -1,14 +1,35 @@
{% load heroicons %}
{% load heroicons i18n %}

<template x-teleport="body" x-data="{scrollBackTop: false, lastScrollTop: 0}">
{# Component for displaying a "back to top" button that appears when scrolling up #}
<template x-teleport="body"
{# fmt:off #}
x-data="{
scrollBackTop: false, // Whether the button should be visible
lastScrollTop: 0, // Last recorded scroll position
checkScroll() {
const scrollingUp = window.scrollY < this.lastScrollTop;
const pastThreshold = window.scrollY > window.innerHeight * 0.4;
// Show button only when scrolling up and past threshold
this.scrollBackTop = scrollingUp && pastThreshold;
this.lastScrollTop = window.scrollY;
},
scrollToTop() {
// Smoothly scroll to top of page
window.scrollTo({top: 0, behavior: 'smooth'});
}
}"
{# fmt:on #}
>
<button
role="button"
x-on:scroll.window.passive="checkScroll"
x-show="scrollBackTop"
x-transition
x-transition.duration.500ms
x-on:scroll.window.throttle.50ms="scrollBackTop = (window.pageYOffset < lastScrollTop && window.pageYOffset > window.outerHeight * 0.4) ? true : false; lastScrollTop = window.pageYOffset;"
@click="window.scrollTo({top: 0, behavior: 'smooth'})"
aria-label="Back to top"
class="fixed top-0 z-30 py-2 px-3 mt-10 text-white rounded-2xl shadow-lg transition-all cursor-pointer hover:text-white hover:shadow-lg focus:outline-none end-1/2 -me-[64px] bg-light-blue/80 hover:bg-light-blue">
{% heroicon_mini "arrow-long-up" class="inline align-text-bottom" size=18 aria_hidden=true %} Back to top
@click="scrollToTop"
class="fixed top-0 z-30 py-2 px-3 mt-10 text-white rounded-2xl shadow-lg transition-all cursor-pointer hover:text-white hover:shadow-lg focus:ring-2 focus:outline-none end-1/2 -me-[64px] bg-light-blue/80 hover:bg-light-blue focus:ring-light-blue"
>
{% heroicon_mini "arrow-long-up" class="inline align-text-bottom" size=18 aria_hidden=true %}
{% trans 'Back to top' %}
</button>
</template>
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