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Code Issues Releases Wiki Activity

Made JS animation cleanup process more reliable

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Fixes #1643
This commit is contained in:
Dan Brown 2019-10-07 20:57:25 +01:00
parent b6c0baf44d
commit d4c62265ca
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GPG Key ID: 46D9F943C24A2EF9
1 changed files with 28 additions and 20 deletions
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38
resources/assets/js/services/animations.js
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@ -1,3 +1,10 @@
/**
* Used in the function below to store references of clean-up functions.
* Used to ensure only one transitionend function exists at any time.
* @type {WeakMap<object, any>}
*/
const animateStylesCleanupMap = new WeakMap();
/**
* Fade out the given element.
* @param {Element} element
@ -5,6 +12,7 @@
* @param {Function|null} onComplete
*/
export function fadeOut(element, animTime = 400, onComplete = null) {
cleanupExistingElementAnimation(element);
animateStyles(element, {
opacity: ['1', '0']
}, animTime, () => {
@ -19,6 +27,7 @@ export function fadeOut(element, animTime = 400, onComplete = null) {
* @param {Number} animTime
*/
export function slideUp(element, animTime = 400) {
cleanupExistingElementAnimation(element);
const currentHeight = element.getBoundingClientRect().height;
const computedStyles = getComputedStyle(element);
const currentPaddingTop = computedStyles.getPropertyValue('padding-top');
@ -41,6 +50,7 @@ export function slideUp(element, animTime = 400) {
* @param {Number} animTime - Animation time in ms
*/
export function slideDown(element, animTime = 400) {
cleanupExistingElementAnimation(element);
element.style.display = 'block';
const targetHeight = element.getBoundingClientRect().height;
const computedStyles = getComputedStyle(element);
@ -56,13 +66,6 @@ export function slideDown(element, animTime = 400) {
animateStyles(element, animStyles, animTime);
}
/**
* Used in the function below to store references of clean-up functions.
* Used to ensure only one transitionend function exists at any time.
* @type {WeakMap<object, any>}
*/
const animateStylesCleanupMap = new WeakMap();
/**
* Animate the css styles of an element using FLIP animation techniques.
* Styles must be an object where the keys are style properties, camelcase, and the values
@ -84,23 +87,28 @@ function animateStyles(element, styles, animTime = 400, onComplete = null) {
}
element.style.transition = null;
element.removeEventListener('transitionend', cleanup);
animateStylesCleanupMap.delete(element);
if (onComplete) onComplete();
};
setTimeout(() => {
requestAnimationFrame(() => {
element.style.transition = `all ease-in-out ${animTime}ms`;
for (let style of styleNames) {
element.style[style] = styles[style][1];
}
if (animateStylesCleanupMap.has(element)) {
const oldCleanup = animateStylesCleanupMap.get(element);
element.removeEventListener('transitionend', oldCleanup);
}
element.addEventListener('transitionend', cleanup);
animateStylesCleanupMap.set(element, cleanup);
});
}, 10);
}, 15);
}
/**
* Run the active cleanup action for the given element.
* @param {Element} element
*/
function cleanupExistingElementAnimation(element) {
if (animateStylesCleanupMap.has(element)) {
const oldCleanup = animateStylesCleanupMap.get(element);
oldCleanup();
}
}