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⚡ Perf: optimize scrolling logic

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Cell
2022-09-10 15:18:24 +08:00
parent af2b4a1951
commit 54a05223f0
3 changed files with 6 additions and 6 deletions
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assets/js/theme.min.js
Vendored
+1 -1
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assets/js/theme.min.js.map
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src/js/theme.js
+4 -4
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@@ -7,7 +7,7 @@ class Util {
}
getScrollTop() {
return (document.documentElement && document.documentElement.scrollTop) || document.body.scrollTop;
return (document.documentElement ?? document.body).scrollTop;
}
isMobile() {
@@ -1012,7 +1012,7 @@ class FixIt {
onScroll() {
const $headers = [];
const ACCURACY = 20, MINIMUM = 100;
const ACCURACY = 20;
const $fixedButtons = document.querySelector('.fixed-buttons');
const $backToTop = document.querySelector('.back-to-top');
const $readingProgressBar = document.querySelector('.reading-progress-bar');
@@ -1047,13 +1047,13 @@ class FixIt {
}
});
const contentHeight = document.body.scrollHeight - window.innerHeight;
const scrollPercent = contentHeight > 0 ? Math.min(100 * window.scrollY / contentHeight, 100) : 0;
const scrollPercent = contentHeight > 0 ? Math.min(100 * (window.scrollY < 0 ? 0 : window.scrollY) / contentHeight, 100) : 0;
if ($readingProgressBar) {
$readingProgressBar.style.setProperty('--progress', `${scrollPercent.toFixed(2)}%`);
}
// whether to show fixed buttons
if ($fixedButtons) {
if (this.newScrollTop > MINIMUM) {
if (scrollPercent > 1) {
$fixedButtons.classList.remove('d-none', 'animate__fadeOut');
this.util.animateCSS($fixedButtons, ['animate__fadeIn'], true);
} else {