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18 lines
532 B
TypeScript
18 lines
532 B
TypeScript
export default function getScroll(target: HTMLElement | Window | null, top: boolean): number {
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if (typeof window === 'undefined') {
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return 0;
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}
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const prop = top ? 'pageYOffset' : 'pageXOffset';
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const method = top ? 'scrollTop' : 'scrollLeft';
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const isWindow = target === window;
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let ret = isWindow ? (target as Window)[prop] : (target as HTMLElement)[method];
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// ie6,7,8 standard mode
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if (isWindow && typeof ret !== 'number') {
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ret = (document.documentElement as HTMLElement)[method];
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}
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return ret;
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}
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