pinafore/routes/_utils/loadPolyfills.js

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import {
importIntersectionObserver,
importRequestIdleCallback,
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importWebAnimationPolyfill
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} from './asyncModules'
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export function loadPolyfills () {
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return Promise.all([
typeof IntersectionObserver === 'undefined' && importIntersectionObserver(),
typeof requestIdleCallback === 'undefined' && importRequestIdleCallback(),
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!Element.prototype.animate && importWebAnimationPolyfill()
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])
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}