scrollTo.js 2.1 KB

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  1. "use strict";
  2. var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
  3. Object.defineProperty(exports, "__esModule", {
  4. value: true
  5. });
  6. exports.default = scrollTo;
  7. var _raf = _interopRequireDefault(require("./raf"));
  8. var _easings = require("./easings");
  9. var _getScroll = _interopRequireWildcard(require("./getScroll"));
  10. function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
  11. function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
  12. function scrollTo(y) {
  13. let options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
  14. const {
  15. getContainer = () => window,
  16. callback,
  17. duration = 450
  18. } = options;
  19. const container = getContainer();
  20. const scrollTop = (0, _getScroll.default)(container, true);
  21. const startTime = Date.now();
  22. const frameFunc = () => {
  23. const timestamp = Date.now();
  24. const time = timestamp - startTime;
  25. const nextScrollTop = (0, _easings.easeInOutCubic)(time > duration ? duration : time, scrollTop, y, duration);
  26. if ((0, _getScroll.isWindow)(container)) {
  27. container.scrollTo(window.scrollX, nextScrollTop);
  28. } else if (container instanceof Document) {
  29. container.documentElement.scrollTop = nextScrollTop;
  30. } else {
  31. container.scrollTop = nextScrollTop;
  32. }
  33. if (time < duration) {
  34. (0, _raf.default)(frameFunc);
  35. } else if (typeof callback === 'function') {
  36. callback();
  37. }
  38. };
  39. (0, _raf.default)(frameFunc);
  40. }