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28 lines
901 B
28 lines
901 B
/* @flow */
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export const getViewportHeight = (): number =>
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// $FlowIssue: "clientHeight" missing in null
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document.documentElement.clientHeight || document.body.clientHeight;
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export const getScrollX = (): number => {
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if (window.pageXOffset !== undefined) {
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return window.pageXOffset;
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}
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if (window.scrollLeft !== undefined) {
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return window.scrollLeft;
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}
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// $FlowIssue: parentNode || scrollLeft missing
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return (document.documentElement || document.body.parentNode || document.body).scrollLeft;
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};
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export const getScrollY = (): number => {
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if (window.pageYOffset !== undefined) {
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return window.pageYOffset;
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}
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if (window.scrollTop !== undefined) {
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return window.scrollTop;
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}
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// $FlowIssue: parentNode || scrollTop missing
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return (document.documentElement || document.body.parentNode || document.body).scrollTop;
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};
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