36 lines
1.3 KiB
JavaScript
36 lines
1.3 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = getScroll;
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exports.isWindow = isWindow;
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function isWindow(obj) {
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return obj !== null && obj !== undefined && obj === obj.window;
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}
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function getScroll(target, top) {
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var _a, _b;
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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[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 instanceof HTMLElement) {
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result = target[method];
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} else if (target) {
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// According to the type inference, the `target` is `never` type.
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// Since we configured the loose mode type checking, and supports mocking the target with such shape below::
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// `{ documentElement: { scrollLeft: 200, scrollTop: 400 } }`,
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// the program may falls into this branch.
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// Check the corresponding tests for details. Don't sure what is the real scenario this happens.
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result = target[method];
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}
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if (target && !isWindow(target) && typeof result !== 'number') {
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result = (_b = ((_a = target.ownerDocument) !== null && _a !== void 0 ? _a : target).documentElement) === null || _b === void 0 ? void 0 : _b[method];
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}
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return result;
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} |