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1/** @license React v0.18.0
2 * scheduler.production.min.js
3 *
4 * Copyright (c) Facebook, Inc. and its affiliates.
5 *
6 * This source code is licensed under the MIT license found in the
7 * LICENSE file in the root directory of this source tree.
8 */
9
10'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var f,g,h,k,l;
11if("undefined"===typeof window||"function"!==typeof MessageChannel){var p=null,q=null,t=function(){if(null!==p)try{var a=exports.unstable_now();p(!0,a);p=null}catch(b){throw setTimeout(t,0),b;}},u=Date.now();exports.unstable_now=function(){return Date.now()-u};f=function(a){null!==p?setTimeout(f,0,a):(p=a,setTimeout(t,0))};g=function(a,b){q=setTimeout(a,b)};h=function(){clearTimeout(q)};k=function(){return!1};l=exports.unstable_forceFrameRate=function(){}}else{var w=window.performance,x=window.Date,
12y=window.setTimeout,z=window.clearTimeout;if("undefined"!==typeof console){var A=window.cancelAnimationFrame;"function"!==typeof window.requestAnimationFrame&&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 A&&console.error("This browser doesn't support cancelAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills")}if("object"===
13typeof w&&"function"===typeof w.now)exports.unstable_now=function(){return w.now()};else{var B=x.now();exports.unstable_now=function(){return x.now()-B}}var C=!1,D=null,E=-1,F=5,G=0;k=function(){return exports.unstable_now()>=G};l=function(){};exports.unstable_forceFrameRate=function(a){0>a||125<a?console.error("forceFrameRate takes a positive int between 0 and 125, forcing framerates higher than 125 fps is not unsupported"):F=0<a?Math.floor(1E3/a):5};var H=new MessageChannel,I=H.port2;H.port1.onmessage=
14function(){if(null!==D){var a=exports.unstable_now();G=a+F;try{D(!0,a)?I.postMessage(null):(C=!1,D=null)}catch(b){throw I.postMessage(null),b;}}else C=!1};f=function(a){D=a;C||(C=!0,I.postMessage(null))};g=function(a,b){E=y(function(){a(exports.unstable_now())},b)};h=function(){z(E);E=-1}}function J(a,b){var c=a.length;a.push(b);a:for(;;){var d=Math.floor((c-1)/2),e=a[d];if(void 0!==e&&0<K(e,b))a[d]=b,a[c]=e,c=d;else break a}}function L(a){a=a[0];return void 0===a?null:a}
15function M(a){var b=a[0];if(void 0!==b){var c=a.pop();if(c!==b){a[0]=c;a:for(var d=0,e=a.length;d<e;){var m=2*(d+1)-1,n=a[m],v=m+1,r=a[v];if(void 0!==n&&0>K(n,c))void 0!==r&&0>K(r,n)?(a[d]=r,a[v]=c,d=v):(a[d]=n,a[m]=c,d=m);else if(void 0!==r&&0>K(r,c))a[d]=r,a[v]=c,d=v;else break a}}return b}return null}function K(a,b){var c=a.sortIndex-b.sortIndex;return 0!==c?c:a.id-b.id}var N=[],O=[],P=1,Q=null,R=3,S=!1,T=!1,U=!1;
16function V(a){for(var b=L(O);null!==b;){if(null===b.callback)M(O);else if(b.startTime<=a)M(O),b.sortIndex=b.expirationTime,J(N,b);else break;b=L(O)}}function W(a){U=!1;V(a);if(!T)if(null!==L(N))T=!0,f(X);else{var b=L(O);null!==b&&g(W,b.startTime-a)}}
17function X(a,b){T=!1;U&&(U=!1,h());S=!0;var c=R;try{V(b);for(Q=L(N);null!==Q&&(!(Q.expirationTime>b)||a&&!k());){var d=Q.callback;if(null!==d){Q.callback=null;R=Q.priorityLevel;var e=d(Q.expirationTime<=b);b=exports.unstable_now();"function"===typeof e?Q.callback=e:Q===L(N)&&M(N);V(b)}else M(N);Q=L(N)}if(null!==Q)var m=!0;else{var n=L(O);null!==n&&g(W,n.startTime-b);m=!1}return m}finally{Q=null,R=c,S=!1}}
18function Y(a){switch(a){case 1:return-1;case 2:return 250;case 5:return 1073741823;case 4:return 1E4;default:return 5E3}}var Z=l;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=R;R=a;try{return b()}finally{R=c}};
19exports.unstable_next=function(a){switch(R){case 1:case 2:case 3:var b=3;break;default:b=R}var c=R;R=b;try{return a()}finally{R=c}};
20exports.unstable_scheduleCallback=function(a,b,c){var d=exports.unstable_now();if("object"===typeof c&&null!==c){var e=c.delay;e="number"===typeof e&&0<e?d+e:d;c="number"===typeof c.timeout?c.timeout:Y(a)}else c=Y(a),e=d;c=e+c;a={id:P++,callback:b,priorityLevel:a,startTime:e,expirationTime:c,sortIndex:-1};e>d?(a.sortIndex=e,J(O,a),null===L(N)&&a===L(O)&&(U?h():U=!0,g(W,e-d))):(a.sortIndex=c,J(N,a),T||S||(T=!0,f(X)));return a};exports.unstable_cancelCallback=function(a){a.callback=null};
21exports.unstable_wrapCallback=function(a){var b=R;return function(){var c=R;R=b;try{return a.apply(this,arguments)}finally{R=c}}};exports.unstable_getCurrentPriorityLevel=function(){return R};exports.unstable_shouldYield=function(){var a=exports.unstable_now();V(a);var b=L(N);return b!==Q&&null!==Q&&null!==b&&null!==b.callback&&b.startTime<=a&&b.expirationTime<Q.expirationTime||k()};exports.unstable_requestPaint=Z;exports.unstable_continueExecution=function(){T||S||(T=!0,f(X))};
22exports.unstable_pauseExecution=function(){};exports.unstable_getFirstCallbackNode=function(){return L(N)};exports.unstable_Profiling=null;