antd
Version:
An enterprise-class UI design language and React components implementation
30 lines • 1.3 kB
JavaScript
export function isWindow(obj) {
return obj !== null && obj !== undefined && obj === obj.window;
}
const getScroll = target => {
var _a, _b;
if (typeof window === 'undefined') {
return 0;
}
let result = 0;
if (isWindow(target)) {
result = target.pageYOffset;
} else if (target instanceof Document) {
result = target.documentElement.scrollTop;
} else if (target instanceof HTMLElement) {
result = target.scrollTop;
} else if (target) {
// According to the type inference, the `target` is `never` type.
// Since we configured the loose mode type checking, and supports mocking the target with such shape below::
// `{ documentElement: { scrollLeft: 200, scrollTop: 400 } }`,
// the program may falls into this branch.
// Check the corresponding tests for details. Don't sure what is the real scenario this happens.
/* biome-ignore lint/complexity/useLiteralKeys: target is a never type */ /* eslint-disable-next-line dot-notation */
result = target['scrollTop'];
}
if (target && !isWindow(target) && typeof result !== 'number') {
result = (_b = ((_a = target.ownerDocument) !== null && _a !== void 0 ? _a : target).documentElement) === null || _b === void 0 ? void 0 : _b.scrollTop;
}
return result;
};
export default getScroll;