28 lines
808 B
TypeScript
28 lines
808 B
TypeScript
export function isWindow(obj: any) {
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return obj !== null && obj !== undefined && obj === obj.window;
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}
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export default function getScroll(
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target: HTMLElement | Window | Document | null,
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top: boolean,
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): number {
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if (typeof window === 'undefined') {
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return 0;
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}
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const method = top ? 'scrollTop' : 'scrollLeft';
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let result = 0;
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if (isWindow(target)) {
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result = (target as Window)[top ? 'pageYOffset' : 'pageXOffset'];
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} else if (target instanceof Document) {
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result = target.documentElement[method];
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} else if (target) {
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result = (target as HTMLElement)[method];
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}
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if (target && !isWindow(target) && typeof result !== 'number') {
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result = ((target as HTMLElement).ownerDocument || (target as Document)).documentElement?.[
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method
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];
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}
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return result;
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}
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