Tried to make chapter toggles a little smoother in FF

This commit is contained in:
Dan Brown 2018-09-22 16:36:35 +01:00
parent 07bc0612c0
commit 0931ff38e9
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GPG Key ID: 46D9F943C24A2EF9
2 changed files with 21 additions and 17 deletions

View File

@ -8,52 +8,56 @@ class ChapterToggle {
}
open() {
let list = this.elem.parentNode.querySelector('.inset-list');
const list = this.elem.parentNode.querySelector('.inset-list');
this.elem.classList.add('open');
list.style.display = 'block';
list.style.height = '';
let height = list.getBoundingClientRect().height;
list.style.height = '0px';
list.style.maxHeight = '';
const maxHeight = list.getBoundingClientRect().height + 10;
list.style.maxHeight = '0px';
list.style.overflow = 'hidden';
list.style.transition = 'height ease-in-out 240ms';
list.style.transition = 'max-height ease-in-out 240ms';
let transitionEndBound = onTransitionEnd.bind(this);
function onTransitionEnd() {
list.style.overflow = '';
list.style.height = '';
list.style.maxHeight = '';
list.style.transition = '';
list.style.display = `block`;
list.removeEventListener('transitionend', transitionEndBound);
}
setTimeout(() => {
list.style.height = `${height}px`;
list.addEventListener('transitionend', transitionEndBound)
requestAnimationFrame(() => {
list.style.maxHeight = `${maxHeight}px`;
list.addEventListener('transitionend', transitionEndBound)
});
}, 1);
}
close() {
let list = this.elem.parentNode.querySelector('.inset-list');
const list = this.elem.parentNode.querySelector('.inset-list');
this.elem.classList.remove('open');
list.style.display = 'block';
list.style.height = list.getBoundingClientRect().height + 'px';
this.elem.classList.remove('open');
list.style.maxHeight = list.getBoundingClientRect().height + 'px';
list.style.overflow = 'hidden';
list.style.transition = 'height ease-in-out 240ms';
list.style.transition = 'max-height ease-in-out 240ms';
let transitionEndBound = onTransitionEnd.bind(this);
const transitionEndBound = onTransitionEnd.bind(this);
function onTransitionEnd() {
list.style.overflow = '';
list.style.height = '';
list.style.maxHeight = '';
list.style.transition = '';
list.style.display = 'none';
list.removeEventListener('transitionend', transitionEndBound);
}
setTimeout(() => {
list.style.height = `0px`;
list.addEventListener('transitionend', transitionEndBound)
requestAnimationFrame(() => {
list.style.maxHeight = `0px`;
list.addEventListener('transitionend', transitionEndBound)
});
}, 1);
}

View File

@ -178,7 +178,7 @@
display: none;
padding-left: 0;
}
.sub-menu.open {
[chapter-toggle].open + .sub-menu {
display: block;
}
}