ant-design-vue/components/_util/getScroll.ts
2021-05-11 22:42:14 +08:00

28 lines
808 B
TypeScript

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