70 lines
1.8 KiB
JavaScript
70 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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var _toConsumableArray2 = require('babel-runtime/helpers/toConsumableArray');
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var _toConsumableArray3 = _interopRequireDefault(_toConsumableArray2);
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exports['default'] = throttleByAnimationFrame;
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exports.throttleByAnimationFrameDecorator = throttleByAnimationFrameDecorator;
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var _raf = require('raf');
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var _raf2 = _interopRequireDefault(_raf);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
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function throttleByAnimationFrame(fn) {
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var requestId = void 0;
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var later = function later(args) {
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return function () {
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requestId = null;
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fn.apply(undefined, (0, _toConsumableArray3['default'])(args));
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};
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};
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var throttled = function throttled() {
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for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
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args[_key] = arguments[_key];
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}
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if (requestId == null) {
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requestId = (0, _raf2['default'])(later(args));
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}
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};
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throttled.cancel = function () {
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return _raf2['default'].cancel(requestId);
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};
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return throttled;
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}
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function throttleByAnimationFrameDecorator() {
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return function (target, key, descriptor) {
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var fn = descriptor.value;
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var definingProperty = false;
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return {
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configurable: true,
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get: function get() {
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if (definingProperty || this === target.prototype || this.hasOwnProperty(key)) {
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return fn;
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}
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var boundFn = throttleByAnimationFrame(fn.bind(this));
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definingProperty = true;
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Object.defineProperty(this, key, {
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value: boundFn,
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configurable: true,
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writable: true
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});
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definingProperty = false;
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return boundFn;
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}
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};
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};
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} |