41 lines
No EOL
1,020 B
JavaScript
41 lines
No EOL
1,020 B
JavaScript
import { getWindow, getDocument } from 'ssr-window';
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let support;
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function calcSupport() {
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const window = getWindow();
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const document = getDocument();
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return {
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smoothScroll: document.documentElement && 'scrollBehavior' in document.documentElement.style,
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touch: !!('ontouchstart' in window || window.DocumentTouch && document instanceof window.DocumentTouch),
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passiveListener: function checkPassiveListener() {
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let supportsPassive = false;
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try {
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const opts = Object.defineProperty({}, 'passive', {
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// eslint-disable-next-line
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get() {
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supportsPassive = true;
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}
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});
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window.addEventListener('testPassiveListener', null, opts);
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} catch (e) {// No support
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}
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return supportsPassive;
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}(),
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gestures: function checkGestures() {
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return 'ongesturestart' in window;
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}()
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};
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}
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function getSupport() {
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if (!support) {
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support = calcSupport();
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}
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return support;
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}
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export { getSupport }; |