60 lines
1.8 KiB
JavaScript
60 lines
1.8 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'] = scrollTo;
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var _raf = require('raf');
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var _raf2 = _interopRequireDefault(_raf);
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var _getScroll = require('./getScroll');
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var _getScroll2 = _interopRequireDefault(_getScroll);
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var _easings = require('./easings');
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
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// interface ScrollToOptions {
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// /** Scroll container, default as window */
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// getContainer?: () => HTMLElement | Window;
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// /** Scroll end callback */
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// callback?: () => any;
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// /** Animation duration, default as 450 */
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// duration?: number;
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// }
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function scrollTo(y) {
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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var _options$getContainer = options.getContainer,
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getContainer = _options$getContainer === undefined ? function () {
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return window;
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} : _options$getContainer,
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callback = options.callback,
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_options$duration = options.duration,
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duration = _options$duration === undefined ? 450 : _options$duration;
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var container = getContainer();
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var scrollTop = (0, _getScroll2['default'])(container, true);
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var startTime = Date.now();
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var frameFunc = function frameFunc() {
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var timestamp = Date.now();
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var time = timestamp - startTime;
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var nextScrollTop = (0, _easings.easeInOutCubic)(time > duration ? duration : time, scrollTop, y, duration);
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if (container === window) {
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window.scrollTo(window.pageXOffset, nextScrollTop);
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} else {
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container.scrollTop = nextScrollTop;
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}
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if (time < duration) {
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(0, _raf2['default'])(frameFunc);
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} else if (typeof callback === 'function') {
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callback();
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}
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};
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(0, _raf2['default'])(frameFunc);
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} |