51 lines
1.4 KiB
JavaScript
51 lines
1.4 KiB
JavaScript
import Component from '@glimmer/component';
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import getScrollParent from '../utils/get-scroll-parent';
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import {action} from '@ember/object';
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import {inject as service} from '@ember/service';
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export default class GhScrollTrigger extends Component {
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@service inViewport;
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@action
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setupInViewport(element) {
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this.loaderElement = element;
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let viewportTolerance = this.args.triggerOffset || {};
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// if triggerOffset is a number we use it for all dimensions
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if (typeof viewportTolerance === 'number') {
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viewportTolerance = {
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top: viewportTolerance,
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bottom: viewportTolerance,
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left: viewportTolerance,
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right: viewportTolerance
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};
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}
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let options = {
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viewportSpy: true,
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viewportTolerance,
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scrollableArea: this.args.scrollable || getScrollParent(element)
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};
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let {onEnter, onExit} = this.inViewport.watchElement(element, options);
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onEnter(this.didEnterViewport.bind(this));
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onExit(this.didExitViewport.bind(this));
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this.args.registerElement?.(element);
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}
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didEnterViewport() {
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this.args.enter?.();
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}
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didExitViewport() {
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this.args.exit?.();
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}
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@action
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teardownInViewport(element) {
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this.inViewport.stopWatching(element);
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}
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}
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