unhandledRejection.js
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/** @license MIT License (c) copyright 2010-2014 original author or authors */
/** @author Brian Cavalier */
/** @author John Hann */
(function(define) { 'use strict';
define(function(require) {
var setTimer = require('../env').setTimer;
var format = require('../format');
return function unhandledRejection(Promise) {
var logError = noop;
var logInfo = noop;
var localConsole;
if(typeof console !== 'undefined') {
// Alias console to prevent things like uglify's drop_console option from
// removing console.log/error. Unhandled rejections fall into the same
// category as uncaught exceptions, and build tools shouldn't silence them.
localConsole = console;
logError = typeof localConsole.error !== 'undefined'
? function (e) { localConsole.error(e); }
: function (e) { localConsole.log(e); };
logInfo = typeof localConsole.info !== 'undefined'
? function (e) { localConsole.info(e); }
: function (e) { localConsole.log(e); };
}
Promise.onPotentiallyUnhandledRejection = function(rejection) {
enqueue(report, rejection);
};
Promise.onPotentiallyUnhandledRejectionHandled = function(rejection) {
enqueue(unreport, rejection);
};
Promise.onFatalRejection = function(rejection) {
enqueue(throwit, rejection.value);
};
var tasks = [];
var reported = [];
var running = null;
function report(r) {
if(!r.handled) {
reported.push(r);
logError('Potentially unhandled rejection [' + r.id + '] ' + format.formatError(r.value));
}
}
function unreport(r) {
var i = reported.indexOf(r);
if(i >= 0) {
reported.splice(i, 1);
logInfo('Handled previous rejection [' + r.id + '] ' + format.formatObject(r.value));
}
}
function enqueue(f, x) {
tasks.push(f, x);
if(running === null) {
running = setTimer(flush, 0);
}
}
function flush() {
running = null;
while(tasks.length > 0) {
tasks.shift()(tasks.shift());
}
}
return Promise;
};
function throwit(e) {
throw e;
}
function noop() {}
});
}(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(require); }));