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- 'use strict';
- var Promise = require('./core');
- var DEFAULT_WHITELIST = [
- ReferenceError,
- TypeError,
- RangeError
- ];
- var enabled = false;
- exports.disable = disable;
- function disable() {
- enabled = false;
- Promise._37 = null;
- Promise._87 = null;
- }
- exports.enable = enable;
- function enable(options) {
- options = options || {};
- if (enabled) disable();
- enabled = true;
- var id = 0;
- var displayId = 0;
- var rejections = {};
- Promise._37 = function (promise) {
- if (
- promise._65 === 2 && // IS REJECTED
- rejections[promise._51]
- ) {
- if (rejections[promise._51].logged) {
- onHandled(promise._51);
- } else {
- clearTimeout(rejections[promise._51].timeout);
- }
- delete rejections[promise._51];
- }
- };
- Promise._87 = function (promise, err) {
- if (promise._40 === 0) { // not yet handled
- promise._51 = id++;
- rejections[promise._51] = {
- displayId: null,
- error: err,
- timeout: setTimeout(
- onUnhandled.bind(null, promise._51),
- // For reference errors and type errors, this almost always
- // means the programmer made a mistake, so log them after just
- // 100ms
- // otherwise, wait 2 seconds to see if they get handled
- matchWhitelist(err, DEFAULT_WHITELIST)
- ? 100
- : 2000
- ),
- logged: false
- };
- }
- };
- function onUnhandled(id) {
- if (
- options.allRejections ||
- matchWhitelist(
- rejections[id].error,
- options.whitelist || DEFAULT_WHITELIST
- )
- ) {
- rejections[id].displayId = displayId++;
- if (options.onUnhandled) {
- rejections[id].logged = true;
- options.onUnhandled(
- rejections[id].displayId,
- rejections[id].error
- );
- } else {
- rejections[id].logged = true;
- logError(
- rejections[id].displayId,
- rejections[id].error
- );
- }
- }
- }
- function onHandled(id) {
- if (rejections[id].logged) {
- if (options.onHandled) {
- options.onHandled(rejections[id].displayId, rejections[id].error);
- } else if (!rejections[id].onUnhandled) {
- console.warn(
- 'Promise Rejection Handled (id: ' + rejections[id].displayId + '):'
- );
- console.warn(
- ' This means you can ignore any previous messages of the form "Possible Unhandled Promise Rejection" with id ' +
- rejections[id].displayId + '.'
- );
- }
- }
- }
- }
- function logError(id, error) {
- console.warn('Possible Unhandled Promise Rejection (id: ' + id + '):');
- var errStr = (error && (error.stack || error)) + '';
- errStr.split('\n').forEach(function (line) {
- console.warn(' ' + line);
- });
- }
- function matchWhitelist(error, list) {
- return list.some(function (cls) {
- return error instanceof cls;
- });
- }
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