39 lines
739 B
JavaScript
39 lines
739 B
JavaScript
export function buffer(fn, ms) {
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let timer;
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function clear() {
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if (timer) {
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clearTimeout(timer);
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timer = null;
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}
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}
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function bufferFn() {
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clear();
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timer = setTimeout(fn, ms);
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}
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bufferFn.clear = clear;
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return bufferFn;
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}
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export function isSamePoint(prev, next) {
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if (prev === next) return true;
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if (!prev || !next) return false;
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if ('pageX' in next && 'pageY' in next) {
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return prev.pageX === next.pageX && prev.pageY === next.pageY;
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}
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if ('clientX' in next && 'clientY' in next) {
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return prev.clientX === next.clientX && prev.clientY === next.clientY;
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}
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return false;
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}
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export function isWindow(obj) {
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return obj && typeof obj === 'object' && obj.window === obj;
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}
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