106 lines
3.9 KiB
JavaScript
106 lines
3.9 KiB
JavaScript
import { DomHandler } from 'primevue/utils';
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import BaseAnimateOnScroll from './BaseAnimateOnScroll';
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const AnimateOnScroll = BaseAnimateOnScroll.extend('animateonscroll', {
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created() {
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this.$value = this.$value || {};
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this.$el.style.opacity = this.$value.enterClass ? '0' : '';
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},
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mounted() {
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this.$el.setAttribute('data-pd-animateonscroll', true);
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this.bindIntersectionObserver();
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},
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unmounted() {
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this.unbindAnimationEvents();
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this.unbindIntersectionObserver();
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},
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observer: undefined,
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resetObserver: undefined,
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isObserverActive: false,
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animationState: undefined,
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animationEndListener: undefined,
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methods: {
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bindAnimationEvents() {
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if (!this.animationEndListener) {
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this.animationEndListener = () => {
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DomHandler.removeMultipleClasses(this.$el, [this.$value.enterClass, this.$value.leaveClass]);
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!this.$modifiers.once && this.resetObserver.observe(this.$el);
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this.unbindAnimationEvents();
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};
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this.$el.addEventListener('animationend', this.animationEndListener);
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}
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},
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bindIntersectionObserver() {
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const { root, rootMargin, threshold = 0.5 } = this.$value;
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const options = { root, rootMargin, threshold };
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// States
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this.observer = new IntersectionObserver(([entry]) => {
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if (this.isObserverActive) {
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if (entry.boundingClientRect.top > 0) {
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entry.isIntersecting ? this.enter() : this.leave();
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}
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} else if (entry.isIntersecting) {
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this.enter();
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}
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this.isObserverActive = true;
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}, options);
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setTimeout(() => this.observer.observe(this.$el), 0);
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// Reset
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this.resetObserver = new IntersectionObserver(
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([entry]) => {
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if (entry.boundingClientRect.top > 0 && !entry.isIntersecting) {
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this.$el.style.opacity = this.$value.enterClass ? '0' : '';
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DomHandler.removeMultipleClasses(this.$el, [this.$value.enterClass, this.$value.leaveClass]);
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this.resetObserver.unobserve(this.$el);
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}
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this.animationState = undefined;
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},
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{ ...options, threshold: 0 }
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);
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},
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enter() {
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if (this.animationState !== 'enter' && this.$value.enterClass) {
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this.$el.style.opacity = '';
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DomHandler.removeMultipleClasses(this.$el, this.$value.leaveClass);
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DomHandler.addMultipleClasses(this.$el, this.$value.enterClass);
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this.$modifiers.once && this.unbindIntersectionObserver(this.$el);
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this.bindAnimationEvents();
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this.animationState = 'enter';
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}
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},
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leave() {
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if (this.animationState !== 'leave' && this.$value.leaveClass) {
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this.$el.style.opacity = this.$value.enterClass ? '0' : '';
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DomHandler.removeMultipleClasses(this.$el, this.$value.enterClass);
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DomHandler.addMultipleClasses(this.$el, this.$value.leaveClass);
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this.bindAnimationEvents();
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this.animationState = 'leave';
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}
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},
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unbindAnimationEvents() {
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if (this.animationEndListener) {
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this.$el.removeEventListener('animationend', this.animationEndListener);
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this.animationEndListener = undefined;
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}
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},
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unbindIntersectionObserver() {
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this.observer?.unobserve(this.$el);
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this.resetObserver?.unobserve(this.$el);
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this.isObserverActive = false;
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}
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}
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});
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export default AnimateOnScroll;
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