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dott-react-popper

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(function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('react'), require('popper.js')) : typeof define === 'function' && define.amd ? define(['react', 'popper.js'], factory) : (global.ReactPopper = factory(global.React,global.Popper)); }(this, (function (React,PopperJS) { 'use strict'; var React__default = 'default' in React ? React['default'] : React; PopperJS = PopperJS && PopperJS.hasOwnProperty('default') ? PopperJS['default'] : PopperJS; function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; } function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); } function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; } function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; } function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; } var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {}; function unwrapExports (x) { return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x; } function createCommonjsModule(fn, module) { return module = { exports: {} }, fn(module, module.exports), module.exports; } function _objectWithoutPropertiesLoose$1(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; } function _extends$1() { _extends$1 = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$1.apply(this, arguments); } /* object-assign (c) Sindre Sorhus @license MIT */ /* eslint-disable no-unused-vars */ var getOwnPropertySymbols = Object.getOwnPropertySymbols; var hasOwnProperty = Object.prototype.hasOwnProperty; var propIsEnumerable = Object.prototype.propertyIsEnumerable; function toObject(val) { if (val === null || val === undefined) { throw new TypeError('Object.assign cannot be called with null or undefined'); } return Object(val); } function shouldUseNative() { try { if (!Object.assign) { return false; } // Detect buggy property enumeration order in older V8 versions. // https://bugs.chromium.org/p/v8/issues/detail?id=4118 var test1 = new String('abc'); // eslint-disable-line no-new-wrappers test1[5] = 'de'; if (Object.getOwnPropertyNames(test1)[0] === '5') { return false; } // https://bugs.chromium.org/p/v8/issues/detail?id=3056 var test2 = {}; for (var i = 0; i < 10; i++) { test2['_' + String.fromCharCode(i)] = i; } var order2 = Object.getOwnPropertyNames(test2).map(function (n) { return test2[n]; }); if (order2.join('') !== '0123456789') { return false; } // https://bugs.chromium.org/p/v8/issues/detail?id=3056 var test3 = {}; 'abcdefghijklmnopqrst'.split('').forEach(function (letter) { test3[letter] = letter; }); if (Object.keys(Object.assign({}, test3)).join('') !== 'abcdefghijklmnopqrst') { return false; } return true; } catch (err) { // We don't expect any of the above to throw, but better to be safe. return false; } } var objectAssign = shouldUseNative() ? Object.assign : function (target, source) { var from; var to = toObject(target); var symbols; for (var s = 1; s < arguments.length; s++) { from = Object(arguments[s]); for (var key in from) { if (hasOwnProperty.call(from, key)) { to[key] = from[key]; } } if (getOwnPropertySymbols) { symbols = getOwnPropertySymbols(from); for (var i = 0; i < symbols.length; i++) { if (propIsEnumerable.call(from, symbols[i])) { to[symbols[i]] = from[symbols[i]]; } } } } return to; }; var scheduler_production_min = createCommonjsModule(function (module, exports) { Object.defineProperty(exports,"__esModule",{value:!0});var d=null,e=!1,g=3,k=-1,l=-1,m=!1,n=!1;function p(){if(!m){var a=d.expirationTime;n?q():n=!0;r(t,a);}} function u(){var a=d,b=d.next;if(d===b)d=null;else{var c=d.previous;d=c.next=b;b.previous=c;}a.next=a.previous=null;c=a.callback;b=a.expirationTime;a=a.priorityLevel;var f=g,Q=l;g=a;l=b;try{var h=c();}finally{g=f,l=Q;}if("function"===typeof h)if(h={callback:h,priorityLevel:a,expirationTime:b,next:null,previous:null},null===d)d=h.next=h.previous=h;else{c=null;a=d;do{if(a.expirationTime>=b){c=a;break}a=a.next;}while(a!==d);null===c?c=d:c===d&&(d=h,p());b=c.previous;b.next=c.previous=h;h.next=c;h.previous= b;}}function v(){if(-1===k&&null!==d&&1===d.priorityLevel){m=!0;try{do u();while(null!==d&&1===d.priorityLevel)}finally{m=!1,null!==d?p():n=!1;}}}function t(a){m=!0;var b=e;e=a;try{if(a)for(;null!==d;){var c=exports.unstable_now();if(d.expirationTime<=c){do u();while(null!==d&&d.expirationTime<=c)}else break}else if(null!==d){do u();while(null!==d&&!w())}}finally{m=!1,e=b,null!==d?p():n=!1,v();}} var x=Date,y="function"===typeof setTimeout?setTimeout:void 0,z="function"===typeof clearTimeout?clearTimeout:void 0,A="function"===typeof requestAnimationFrame?requestAnimationFrame:void 0,B="function"===typeof cancelAnimationFrame?cancelAnimationFrame:void 0,C,D;function E(a){C=A(function(b){z(D);a(b);});D=y(function(){B(C);a(exports.unstable_now());},100);} if("object"===typeof performance&&"function"===typeof performance.now){var F=performance;exports.unstable_now=function(){return F.now()};}else exports.unstable_now=function(){return x.now()};var r,q,w,G=null;"undefined"!==typeof window?G=window:"undefined"!==typeof commonjsGlobal&&(G=commonjsGlobal); if(G&&G._schedMock){var H=G._schedMock;r=H[0];q=H[1];w=H[2];exports.unstable_now=H[3];}else if("undefined"===typeof window||"function"!==typeof MessageChannel){var I=null,J=function(a){if(null!==I)try{I(a);}finally{I=null;}};r=function(a){null!==I?setTimeout(r,0,a):(I=a,setTimeout(J,0,!1));};q=function(){I=null;};w=function(){return !1};}else{"undefined"!==typeof console&&("function"!==typeof A&&console.error("This browser doesn't support requestAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills"), "function"!==typeof B&&console.error("This browser doesn't support cancelAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills"));var K=null,L=!1,M=-1,N=!1,O=!1,P=0,R=33,S=33;w=function(){return P<=exports.unstable_now()};var T=new MessageChannel,U=T.port2;T.port1.onmessage=function(){L=!1;var a=K,b=M;K=null;M=-1;var c=exports.unstable_now(),f=!1;if(0>=P-c)if(-1!==b&&b<=c)f=!0;else{N||(N=!0,E(V));K=a;M=b;return}if(null!==a){O=!0;try{a(f);}finally{O=!1;}}}; var V=function(a){if(null!==K){E(V);var b=a-P+S;b<S&&R<S?(8>b&&(b=8),S=b<R?R:b):R=b;P=a+S;L||(L=!0,U.postMessage(void 0));}else N=!1;};r=function(a,b){K=a;M=b;O||0>b?U.postMessage(void 0):N||(N=!0,E(V));};q=function(){K=null;L=!1;M=-1;};}exports.unstable_ImmediatePriority=1;exports.unstable_UserBlockingPriority=2;exports.unstable_NormalPriority=3;exports.unstable_IdlePriority=5;exports.unstable_LowPriority=4; exports.unstable_runWithPriority=function(a,b){switch(a){case 1:case 2:case 3:case 4:case 5:break;default:a=3;}var c=g,f=k;g=a;k=exports.unstable_now();try{return b()}finally{g=c,k=f,v();}};exports.unstable_next=function(a){switch(g){case 1:case 2:case 3:var b=3;break;default:b=g;}var c=g,f=k;g=b;k=exports.unstable_now();try{return a()}finally{g=c,k=f,v();}}; exports.unstable_scheduleCallback=function(a,b){var c=-1!==k?k:exports.unstable_now();if("object"===typeof b&&null!==b&&"number"===typeof b.timeout)b=c+b.timeout;else switch(g){case 1:b=c+-1;break;case 2:b=c+250;break;case 5:b=c+1073741823;break;case 4:b=c+1E4;break;default:b=c+5E3;}a={callback:a,priorityLevel:g,expirationTime:b,next:null,previous:null};if(null===d)d=a.next=a.previous=a,p();else{c=null;var f=d;do{if(f.expirationTime>b){c=f;break}f=f.next;}while(f!==d);null===c?c=d:c===d&&(d=a,p()); b=c.previous;b.next=c.previous=a;a.next=c;a.previous=b;}return a};exports.unstable_cancelCallback=function(a){var b=a.next;if(null!==b){if(b===a)d=null;else{a===d&&(d=b);var c=a.previous;c.next=b;b.previous=c;}a.next=a.previous=null;}};exports.unstable_wrapCallback=function(a){var b=g;return function(){var c=g,f=k;g=b;k=exports.unstable_now();try{return a.apply(this,arguments)}finally{g=c,k=f,v();}}};exports.unstable_getCurrentPriorityLevel=function(){return g}; exports.unstable_shouldYield=function(){return !e&&(null!==d&&d.expirationTime<l||w())};exports.unstable_continueExecution=function(){null!==d&&p();};exports.unstable_pauseExecution=function(){};exports.unstable_getFirstCallbackNode=function(){return d}; }); unwrapExports(scheduler_production_min); var scheduler_production_min_1 = scheduler_production_min.unstable_now; var scheduler_production_min_2 = scheduler_production_min.unstable_ImmediatePriority; var scheduler_production_min_3 = scheduler_production_min.unstable_UserBlockingPriority; var scheduler_production_min_4 = scheduler_production_min.unstable_NormalPriority; var scheduler_production_min_5 = scheduler_production_min.unstable_IdlePriority; var scheduler_production_min_6 = scheduler_production_min.unstable_LowPriority; var scheduler_production_min_7 = scheduler_production_min.unstable_runWithPriority; var scheduler_production_min_8 = scheduler_production_min.unstable_next; var scheduler_production_min_9 = scheduler_production_min.unstable_scheduleCallback; var scheduler_production_min_10 = scheduler_production_min.unstable_cancelCallback; var scheduler_production_min_11 = scheduler_production_min.unstable_wrapCallback; var scheduler_production_min_12 = scheduler_production_min.unstable_getCurrentPriorityLevel; var scheduler_production_min_13 = scheduler_production_min.unstable_shouldYield; var scheduler_production_min_14 = scheduler_production_min.unstable_continueExecution; var scheduler_production_min_15 = scheduler_production_min.unstable_pauseExecution; var scheduler_production_min_16 = scheduler_production_min.unstable_getFirstCallbackNode; var scheduler_development = createCommonjsModule(function (module, exports) { { (function() { Object.defineProperty(exports, '__esModule', { value: true }); var enableSchedulerDebugging = false; /* eslint-disable no-var */ // TODO: Use symbols? var ImmediatePriority = 1; var UserBlockingPriority = 2; var NormalPriority = 3; var LowPriority = 4; var IdlePriority = 5; // Max 31 bit integer. The max integer size in V8 for 32-bit systems. // Math.pow(2, 30) - 1 // 0b111111111111111111111111111111 var maxSigned31BitInt = 1073741823; // Times out immediately var IMMEDIATE_PRIORITY_TIMEOUT = -1; // Eventually times out var USER_BLOCKING_PRIORITY = 250; var NORMAL_PRIORITY_TIMEOUT = 5000; var LOW_PRIORITY_TIMEOUT = 10000; // Never times out var IDLE_PRIORITY = maxSigned31BitInt; // Callbacks are stored as a circular, doubly linked list. var firstCallbackNode = null; var currentDidTimeout = false; var currentPriorityLevel = NormalPriority; var currentEventStartTime = -1; var currentExpirationTime = -1; // This is set when a callback is being executed, to prevent re-entrancy. var isExecutingCallback = false; var isHostCallbackScheduled = false; var hasNativePerformanceNow = typeof performance === 'object' && typeof performance.now === 'function'; function ensureHostCallbackIsScheduled() { if (isExecutingCallback) { // Don't schedule work yet; wait until the next time we yield. return; } // Schedule the host callback using the earliest expiration in the list. var expirationTime = firstCallbackNode.expirationTime; if (!isHostCallbackScheduled) { isHostCallbackScheduled = true; } else { // Cancel the existing host callback. cancelHostCallback(); } requestHostCallback(flushWork, expirationTime); } function flushFirstCallback() { var flushedNode = firstCallbackNode; // Remove the node from the list before calling the callback. That way the // list is in a consistent state even if the callback throws. var next = firstCallbackNode.next; if (firstCallbackNode === next) { // This is the last callback in the list. firstCallbackNode = null; next = null; } else { var lastCallbackNode = firstCallbackNode.previous; firstCallbackNode = lastCallbackNode.next = next; next.previous = lastCallbackNode; } flushedNode.next = flushedNode.previous = null; // Now it's safe to call the callback. var callback = flushedNode.callback; var expirationTime = flushedNode.expirationTime; var priorityLevel = flushedNode.priorityLevel; var previousPriorityLevel = currentPriorityLevel; var previousExpirationTime = currentExpirationTime; currentPriorityLevel = priorityLevel; currentExpirationTime = expirationTime; var continuationCallback; try { continuationCallback = callback(); } finally { currentPriorityLevel = previousPriorityLevel; currentExpirationTime = previousExpirationTime; } // A callback may return a continuation. The continuation should be scheduled // with the same priority and expiration as the just-finished callback. if (typeof continuationCallback === 'function') { var continuationNode = { callback: continuationCallback, priorityLevel: priorityLevel, expirationTime: expirationTime, next: null, previous: null }; // Insert the new callback into the list, sorted by its expiration. This is // almost the same as the code in `scheduleCallback`, except the callback // is inserted into the list *before* callbacks of equal expiration instead // of after. if (firstCallbackNode === null) { // This is the first callback in the list. firstCallbackNode = continuationNode.next = continuationNode.previous = continuationNode; } else { var nextAfterContinuation = null; var node = firstCallbackNode; do { if (node.expirationTime >= expirationTime) { // This callback expires at or after the continuation. We will insert // the continuation *before* this callback. nextAfterContinuation = node; break; } node = node.next; } while (node !== firstCallbackNode); if (nextAfterContinuation === null) { // No equal or lower priority callback was found, which means the new // callback is the lowest priority callback in the list. nextAfterContinuation = firstCallbackNode; } else if (nextAfterContinuation === firstCallbackNode) { // The new callback is the highest priority callback in the list. firstCallbackNode = continuationNode; ensureHostCallbackIsScheduled(); } var previous = nextAfterContinuation.previous; previous.next = nextAfterContinuation.previous = continuationNode; continuationNode.next = nextAfterContinuation; continuationNode.previous = previous; } } } function flushImmediateWork() { if ( // Confirm we've exited the outer most event handler currentEventStartTime === -1 && firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority) { isExecutingCallback = true; try { do { flushFirstCallback(); } while ( // Keep flushing until there are no more immediate callbacks firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority); } finally { isExecutingCallback = false; if (firstCallbackNode !== null) { // There's still work remaining. Request another callback. ensureHostCallbackIsScheduled(); } else { isHostCallbackScheduled = false; } } } } function flushWork(didTimeout) { isExecutingCallback = true; var previousDidTimeout = currentDidTimeout; currentDidTimeout = didTimeout; try { if (didTimeout) { // Flush all the expired callbacks without yielding. while (firstCallbackNode !== null && !(enableSchedulerDebugging)) { // TODO Wrap in feature flag // Read the current time. Flush all the callbacks that expire at or // earlier than that time. Then read the current time again and repeat. // This optimizes for as few performance.now calls as possible. var currentTime = exports.unstable_now(); if (firstCallbackNode.expirationTime <= currentTime) { do { flushFirstCallback(); } while (firstCallbackNode !== null && firstCallbackNode.expirationTime <= currentTime && !(enableSchedulerDebugging)); continue; } break; } } else { // Keep flushing callbacks until we run out of time in the frame. if (firstCallbackNode !== null) { do { flushFirstCallback(); } while (firstCallbackNode !== null && !shouldYieldToHost()); } } } finally { isExecutingCallback = false; currentDidTimeout = previousDidTimeout; if (firstCallbackNode !== null) { // There's still work remaining. Request another callback. ensureHostCallbackIsScheduled(); } else { isHostCallbackScheduled = false; } // Before exiting, flush all the immediate work that was scheduled. flushImmediateWork(); } } function unstable_runWithPriority(priorityLevel, eventHandler) { switch (priorityLevel) { case ImmediatePriority: case UserBlockingPriority: case NormalPriority: case LowPriority: case IdlePriority: break; default: priorityLevel = NormalPriority; } var previousPriorityLevel = currentPriorityLevel; var previousEventStartTime = currentEventStartTime; currentPriorityLevel = priorityLevel; currentEventStartTime = exports.unstable_now(); try { return eventHandler(); } finally { currentPriorityLevel = previousPriorityLevel; currentEventStartTime = previousEventStartTime; // Before exiting, flush all the immediate work that was scheduled. flushImmediateWork(); } } function unstable_next(eventHandler) { var priorityLevel = void 0; switch (currentPriorityLevel) { case ImmediatePriority: case UserBlockingPriority: case NormalPriority: // Shift down to normal priority priorityLevel = NormalPriority; break; default: // Anything lower than normal priority should remain at the current level. priorityLevel = currentPriorityLevel; break; } var previousPriorityLevel = currentPriorityLevel; var previousEventStartTime = currentEventStartTime; currentPriorityLevel = priorityLevel; currentEventStartTime = exports.unstable_now(); try { return eventHandler(); } finally { currentPriorityLevel = previousPriorityLevel; currentEventStartTime = previousEventStartTime; // Before exiting, flush all the immediate work that was scheduled. flushImmediateWork(); } } function unstable_wrapCallback(callback) { var parentPriorityLevel = currentPriorityLevel; return function () { // This is a fork of runWithPriority, inlined for performance. var previousPriorityLevel = currentPriorityLevel; var previousEventStartTime = currentEventStartTime; currentPriorityLevel = parentPriorityLevel; currentEventStartTime = exports.unstable_now(); try { return callback.apply(this, arguments); } finally { currentPriorityLevel = previousPriorityLevel; currentEventStartTime = previousEventStartTime; flushImmediateWork(); } }; } function unstable_scheduleCallback(callback, deprecated_options) { var startTime = currentEventStartTime !== -1 ? currentEventStartTime : exports.unstable_now(); var expirationTime; if (typeof deprecated_options === 'object' && deprecated_options !== null && typeof deprecated_options.timeout === 'number') { // FIXME: Remove this branch once we lift expiration times out of React. expirationTime = startTime + deprecated_options.timeout; } else { switch (currentPriorityLevel) { case ImmediatePriority: expirationTime = startTime + IMMEDIATE_PRIORITY_TIMEOUT; break; case UserBlockingPriority: expirationTime = startTime + USER_BLOCKING_PRIORITY; break; case IdlePriority: expirationTime = startTime + IDLE_PRIORITY; break; case LowPriority: expirationTime = startTime + LOW_PRIORITY_TIMEOUT; break; case NormalPriority: default: expirationTime = startTime + NORMAL_PRIORITY_TIMEOUT; } } var newNode = { callback: callback, priorityLevel: currentPriorityLevel, expirationTime: expirationTime, next: null, previous: null }; // Insert the new callback into the list, ordered first by expiration, then // by insertion. So the new callback is inserted any other callback with // equal expiration. if (firstCallbackNode === null) { // This is the first callback in the list. firstCallbackNode = newNode.next = newNode.previous = newNode; ensureHostCallbackIsScheduled(); } else { var next = null; var node = firstCallbackNode; do { if (node.expirationTime > expirationTime) { // The new callback expires before this one. next = node; break; } node = node.next; } while (node !== firstCallbackNode); if (next === null) { // No callback with a later expiration was found, which means the new // callback has the latest expiration in the list. next = firstCallbackNode; } else if (next === firstCallbackNode) { // The new callback has the earliest expiration in the entire list. firstCallbackNode = newNode; ensureHostCallbackIsScheduled(); } var previous = next.previous; previous.next = next.previous = newNode; newNode.next = next; newNode.previous = previous; } return newNode; } function unstable_pauseExecution() { } function unstable_continueExecution() { if (firstCallbackNode !== null) { ensureHostCallbackIsScheduled(); } } function unstable_getFirstCallbackNode() { return firstCallbackNode; } function unstable_cancelCallback(callbackNode) { var next = callbackNode.next; if (next === null) { // Already cancelled. return; } if (next === callbackNode) { // This is the only scheduled callback. Clear the list. firstCallbackNode = null; } else { // Remove the callback from its position in the list. if (callbackNode === firstCallbackNode) { firstCallbackNode = next; } var previous = callbackNode.previous; previous.next = next; next.previous = previous; } callbackNode.next = callbackNode.previous = null; } function unstable_getCurrentPriorityLevel() { return currentPriorityLevel; } function unstable_shouldYield() { return !currentDidTimeout && (firstCallbackNode !== null && firstCallbackNode.expirationTime < currentExpirationTime || shouldYieldToHost()); } // The remaining code is essentially a polyfill for requestIdleCallback. It // works by scheduling a requestAnimationFrame, storing the time for the start // of the frame, then scheduling a postMessage which gets scheduled after paint. // Within the postMessage handler do as much work as possible until time + frame // rate. By separating the idle call into a separate event tick we ensure that // layout, paint and other browser work is counted against the available time. // The frame rate is dynamically adjusted. // We capture a local reference to any global, in case it gets polyfilled after // this module is initially evaluated. We want to be using a // consistent implementation. var localDate = Date; // This initialization code may run even on server environments if a component // just imports ReactDOM (e.g. for findDOMNode). Some environments might not // have setTimeout or clearTimeout. However, we always expect them to be defined // on the client. https://github.com/facebook/react/pull/13088 var localSetTimeout = typeof setTimeout === 'function' ? setTimeout : undefined; var localClearTimeout = typeof clearTimeout === 'function' ? clearTimeout : undefined; // We don't expect either of these to necessarily be defined, but we will error // later if they are missing on the client. var localRequestAnimationFrame = typeof requestAnimationFrame === 'function' ? requestAnimationFrame : undefined; var localCancelAnimationFrame = typeof cancelAnimationFrame === 'function' ? cancelAnimationFrame : undefined; // requestAnimationFrame does not run when the tab is in the background. If // we're backgrounded we prefer for that work to happen so that the page // continues to load in the background. So we also schedule a 'setTimeout' as // a fallback. // TODO: Need a better heuristic for backgrounded work. var ANIMATION_FRAME_TIMEOUT = 100; var rAFID; var rAFTimeoutID; var requestAnimationFrameWithTimeout = function (callback) { // schedule rAF and also a setTimeout rAFID = localRequestAnimationFrame(function (timestamp) { // cancel the setTimeout localClearTimeout(rAFTimeoutID); callback(timestamp); }); rAFTimeoutID = localSetTimeout(function () { // cancel the requestAnimationFrame localCancelAnimationFrame(rAFID); callback(exports.unstable_now()); }, ANIMATION_FRAME_TIMEOUT); }; if (hasNativePerformanceNow) { var Performance = performance; exports.unstable_now = function () { return Performance.now(); }; } else { exports.unstable_now = function () { return localDate.now(); }; } var requestHostCallback; var cancelHostCallback; var shouldYieldToHost; var globalValue = null; if (typeof window !== 'undefined') { globalValue = window; } else if (typeof commonjsGlobal !== 'undefined') { globalValue = commonjsGlobal; } if (globalValue && globalValue._schedMock) { // Dynamic injection, only for testing purposes. var globalImpl = globalValue._schedMock; requestHostCallback = globalImpl[0]; cancelHostCallback = globalImpl[1]; shouldYieldToHost = globalImpl[2]; exports.unstable_now = globalImpl[3]; } else if ( // If Scheduler runs in a non-DOM environment, it falls back to a naive // implementation using setTimeout. typeof window === 'undefined' || // Check if MessageChannel is supported, too. typeof MessageChannel !== 'function') { // If this accidentally gets imported in a non-browser environment, e.g. JavaScriptCore, // fallback to a naive implementation. var _callback = null; var _flushCallback = function (didTimeout) { if (_callback !== null) { try { _callback(didTimeout); } finally { _callback = null; } } }; requestHostCallback = function (cb, ms) { if (_callback !== null) { // Protect against re-entrancy. setTimeout(requestHostCallback, 0, cb); } else { _callback = cb; setTimeout(_flushCallback, 0, false); } }; cancelHostCallback = function () { _callback = null; }; shouldYieldToHost = function () { return false; }; } else { if (typeof console !== 'undefined') { // TODO: Remove fb.me link if (typeof localRequestAnimationFrame !== 'function') { console.error("This browser doesn't support requestAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills'); } if (typeof localCancelAnimationFrame !== 'function') { console.error("This browser doesn't support cancelAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills'); } } var scheduledHostCallback = null; var isMessageEventScheduled = false; var timeoutTime = -1; var isAnimationFrameScheduled = false; var isFlushingHostCallback = false; var frameDeadline = 0; // We start out assuming that we run at 30fps but then the heuristic tracking // will adjust this value to a faster fps if we get more frequent animation // frames. var previousFrameTime = 33; var activeFrameTime = 33; shouldYieldToHost = function () { return frameDeadline <= exports.unstable_now(); }; // We use the postMessage trick to defer idle work until after the repaint. var channel = new MessageChannel(); var port = channel.port2; channel.port1.onmessage = function (event) { isMessageEventScheduled = false; var prevScheduledCallback = scheduledHostCallback; var prevTimeoutTime = timeoutTime; scheduledHostCallback = null; timeoutTime = -1; var currentTime = exports.unstable_now(); var didTimeout = false; if (frameDeadline - currentTime <= 0) { // There's no time left in this idle period. Check if the callback has // a timeout and whether it's been exceeded. if (prevTimeoutTime !== -1 && prevTimeoutTime <= currentTime) { // Exceeded the timeout. Invoke the callback even though there's no // time left. didTimeout = true; } else { // No timeout. if (!isAnimationFrameScheduled) { // Schedule another animation callback so we retry later. isAnimationFrameScheduled = true; requestAnimationFrameWithTimeout(animationTick); } // Exit without invoking the callback. scheduledHostCallback = prevScheduledCallback; timeoutTime = prevTimeoutTime; return; } } if (prevScheduledCallback !== null) { isFlushingHostCallback = true; try { prevScheduledCallback(didTimeout); } finally { isFlushingHostCallback = false; } } }; var animationTick = function (rafTime) { if (scheduledHostCallback !== null) { // Eagerly schedule the next animation callback at the beginning of the // frame. If the scheduler queue is not empty at the end of the frame, it // will continue flushing inside that callback. If the queue *is* empty, // then it will exit immediately. Posting the callback at the start of the // frame ensures it's fired within the earliest possible frame. If we // waited until the end of the frame to post the callback, we risk the // browser skipping a frame and not firing the callback until the frame // after that. requestAnimationFrameWithTimeout(animationTick); } else { // No pending work. Exit. isAnimationFrameScheduled = false; return; } var nextFrameTime = rafTime - frameDeadline + activeFrameTime; if (nextFrameTime < activeFrameTime && previousFrameTime < activeFrameTime) { if (nextFrameTime < 8) { // Defensive coding. 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