27 lines
558 B
JavaScript
27 lines
558 B
JavaScript
const SCROLL_DELTA = 48;
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const scrollUp = (page, count) => {
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let x = page.scrollX;
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let y = page.scrollY - SCROLL_DELTA * count;
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page.scrollTo(x, y);
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};
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const scrollDown = (page, count) => {
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let x = page.scrollX;
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let y = page.scrollY + SCROLL_DELTA * count;
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page.scrollTo(x, y);
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};
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const scrollTop = (page) => {
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let x = page.scrollX;
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let y = 0;
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page.scrollTo(x, y);
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};
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const scrollBottom = (page) => {
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let x = page.scrollX;
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let y = page.scrollMaxY;
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page.scrollTo(x, y);
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};
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export { scrollUp, scrollDown, scrollTop, scrollBottom }
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