69 lines
2.2 KiB
JavaScript
69 lines
2.2 KiB
JavaScript
var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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var stdin_exports = {};
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__export(stdin_exports, {
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scrollLeftTo: () => scrollLeftTo,
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scrollTopTo: () => scrollTopTo
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});
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module.exports = __toCommonJS(stdin_exports);
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var import_use = require("@vant/use");
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var import_utils = require("../utils");
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function scrollLeftTo(scroller, to, duration) {
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let rafId;
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let count = 0;
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const from = scroller.scrollLeft;
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const frames = duration === 0 ? 1 : Math.round(duration * 1e3 / 16);
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let scrollLeft = from;
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function cancel() {
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(0, import_use.cancelRaf)(rafId);
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}
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function animate() {
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scrollLeft += (to - from) / frames;
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scroller.scrollLeft = scrollLeft;
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if (++count < frames) {
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rafId = (0, import_use.raf)(animate);
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}
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}
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animate();
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return cancel;
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}
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function scrollTopTo(scroller, to, duration, callback) {
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let rafId;
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let current = (0, import_utils.getScrollTop)(scroller);
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const isDown = current < to;
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const frames = duration === 0 ? 1 : Math.round(duration * 1e3 / 16);
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const step = (to - current) / frames;
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function cancel() {
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(0, import_use.cancelRaf)(rafId);
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}
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function animate() {
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current += step;
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if (isDown && current > to || !isDown && current < to) {
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current = to;
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}
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(0, import_utils.setScrollTop)(scroller, current);
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if (isDown && current < to || !isDown && current > to) {
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rafId = (0, import_use.raf)(animate);
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} else if (callback) {
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rafId = (0, import_use.raf)(callback);
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}
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}
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animate();
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return cancel;
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}
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