Rollbar notifier for JavaScript Build Status

Quick start Browser

Copy-paste the following code into the <head> of every page you want to monitor. It should be as high as possible, before any other <script> tags.

Be sure to replace POST_CLIENT_ITEM_ACCESS_TOKEN with your project's post_client_item access token, which you can find in the interface. You can find this in your project settings ("Settings" link at the top of the Rollbar website) in the "Project Access Tokens" settings area.

var _rollbarConfig = {
    captureUncaught: true,
    captureUnhandledRejections: true,
    payload: {
        environment: "production"
// Rollbar Snippet
!function(r){function o(e){if(n[e])return n[e].exports;var t=n[e]={exports:{},id:e,loaded:!1};return r[e].call(t.exports,t,t.exports,o),t.loaded=!0,t.exports}var n={};return o.m=r,o.c=n,o.p="",o(0)}([function(r,o,n){"use strict";var e=n(1),t=n(4);_rollbarConfig=_rollbarConfig||{},_rollbarConfig.rollbarJsUrl=_rollbarConfig.rollbarJsUrl||"",_rollbarConfig.async=void 0===_rollbarConfig.async||_rollbarConfig.async;var a=e.setupShim(window,_rollbarConfig),l=t(_rollbarConfig);window.rollbar=e.Rollbar,a.loadFull(window,document,!_rollbarConfig.async,_rollbarConfig,l)},function(r,o,n){"use strict";function e(r){return function(){try{return r.apply(this,arguments)}catch(o){try{console.error("[Rollbar]: Internal error",o)}catch(n){}}}}function t(r,o){this.options=r,this._rollbarOldOnError=null;var n=s++;this.shimId=function(){return n},window&&window._rollbarShims&&(window._rollbarShims[n]={handler:o,messages:[]})}function a(r,o){var n=o.globalAlias||"Rollbar";if("object"==typeof r[n])return r[n];r._rollbarShims={},r._rollbarWrappedError=null;var t=new p(o);return e(function(){return o.captureUncaught&&(t._rollbarOldOnError=r.onerror,i.captureUncaughtExceptions(r,t),i.wrapGlobals(r,t)),o.captureUnhandledRejections&&i.captureUnhandledRejections(r,t),r[n]=t,t})()}function l(r){return e(function(){var o=this,,0),e={shim:o,method:r,args:n,ts:new Date};window._rollbarShims[this.shimId()].messages.push(e)})}var i=n(2),s=0,c=n(3),d=function(r,o){return new t(r,o)},p=c.bind(null,d);t.prototype.loadFull=function(r,o,n,t,a){var l=function(){var o;if(void 0===r._rollbarDidLoad){o=new Error("rollbar.js did not load");for(var n,e,t,l,i=0;n=r._rollbarShims[i++];)for(n=n.messages||[];e=n.shift();)for(t=e.args||[],i=0;i<t.length;++i)if(l=t[i],"function"==typeof l){l(o);break}}"function"==typeof a&&a(o)},i=!1,s=o.createElement("script"),c=o.getElementsByTagName("script")[0],d=c.parentNode;s.crossOrigin="",s.src=t.rollbarJsUrl,n||(s.async=!0),s.onload=s.onreadystatechange=e(function(){if(!(i||this.readyState&&"loaded"!==this.readyState&&"complete"!==this.readyState)){s.onload=s.onreadystatechange=null;try{d.removeChild(s)}catch(r){}i=!0,l()}}),d.insertBefore(s,c)},t.prototype.wrap=function(r,o){try{var n;if(n="function"==typeof o?o:function(){return o||{}},"function"!=typeof r)return r;if(r._isWrap)return r;if(!r._wrapped){r._wrapped=function(){try{return r.apply(this,arguments)}catch(o){var e=o;throw"string"==typeof e&&(e=new String(e)),e._rollbarContext=n()||{},e._rollbarContext._wrappedSource=r.toString(),window._rollbarWrappedError=e,e}},r._wrapped._isWrap=!0;for(var e in r)r.hasOwnProperty(e)&&(r._wrapped[e]=r[e])}return r._wrapped}catch(t){return r}};for(var u="log,debug,info,warn,warning,error,critical,global,configure,handleUncaughtException,handleUnhandledRejection".split(","),f=0;f<u.length;++f)t.prototype[u[f]]=l(u[f]);r.exports={setupShim:a,Rollbar:p}},function(r,o){"use strict";function n(r,o){if(r){var n;"function"==typeof o._rollbarOldOnError?n=o._rollbarOldOnError:r.onerror&&!r.onerror.belongsToRollbar&&(n=r.onerror,o._rollbarOldOnError=n);var t=function(){var,0);e(r,o,n,t)};t.belongsToRollbar=!0,r.onerror=t}}function e(r,o,n,e){r._rollbarWrappedError&&(e[4]||(e[4]=r._rollbarWrappedError),e[5]||(e[5]=r._rollbarWrappedError._rollbarContext),r._rollbarWrappedError=null),o.handleUncaughtException.apply(o,e),n&&n.apply(r,e)}function t(r,o){if(r){"function"==typeof r._rollbarURH&&r.removeEventListener("unhandledrejection",r._rollbarURH);var n=function(r){var n=r.reason,e=r.promise,t=r.detail;!n&&t&&(n=t.reason,e=t.promise),o&&o.handleUnhandledRejection&&o.handleUnhandledRejection(n,e)};r._rollbarURH=n,r.addEventListener("unhandledrejection",n)}}function a(r,o){if(r){var n,e,t="EventTarget,Window,Node,ApplicationCache,AudioTrackList,ChannelMergerNode,CryptoOperation,EventSource,FileReader,HTMLUnknownElement,IDBDatabase,IDBRequest,IDBTransaction,KeyOperation,MediaController,MessagePort,ModalWindow,Notification,SVGElementInstance,Screen,TextTrack,TextTrackCue,TextTrackList,WebSocket,WebSocketWorker,Worker,XMLHttpRequest,XMLHttpRequestEventTarget,XMLHttpRequestUpload".split(",");for(n=0;n<t.length;++n)e=t[n],r[e]&&r[e].prototype&&l(o,r[e].prototype)}}function l(r,o){if(o.hasOwnProperty&&o.hasOwnProperty("addEventListener")){var n=o.addEventListener;n._rollbarOldAdd&&(n=n._rollbarOldAdd);var e=function(o,e,t){,o,r.wrap(e),t)};e._rollbarOldAdd=n,o.addEventListener=e;var t=o.removeEventListener;t._rollbarOldRemove&&(t=t._rollbarOldRemove);var a=function(r,o,n){,r,o&&o._wrapped||o,n)};a._rollbarOldRemove=t,o.removeEventListener=a}}r.exports={captureUncaughtExceptions:n,captureUnhandledRejections:t,wrapGlobals:a}},function(r,o){"use strict";function n(r,o){this.impl=r(o,this),this.options=o,e(n.prototype)}function e(r){for(var o=function(r){return function(){var,0);if(this.impl[r])return this.impl[r].apply(this.impl,o)}},n="log,debug,info,warn,warning,error,critical,global,configure,handleUncaughtException,handleUnhandledRejection,_createItem,wrap,loadFull,shimId".split(","),e=0;e<n.length;e++)r[n[e]]=o(n[e])}n.prototype._swapAndProcessMessages=function(r,o){this.impl=r(this.options);for(var n,e,t;n=o.shift();)e=n.method,t=n.args,this[e]&&"function"==typeof this[e]&&this[e].apply(this,t);return this},r.exports=n},function(r,o){"use strict";r.exports=function(r){return function(o){if(!o&&!window._rollbarInitialized){r=r||{};for(var n,e,t=r.globalAlias||"Rollbar",a=window.rollbar,l=function(r){return new a(r)},i=0;n=window._rollbarShims[i++];)e||(e=n.handler),n.handler._swapAndProcessMessages(l,n.messages);window[t]=e,window._rollbarInitialized=!0}}}}]);
// End Rollbar Snippet

If you're running Rollbar on an environment besides production, change the environment value to something else (e.g. "staging"). See below for more configuration options.

Test your installation

  1. Navigate your browser to a page that has the above code installed
  2. Type the following code into the console and press enter: window.onerror("TestRollbarError: testing window.onerror", window.location.href)

This simulates an uncaught error. It should appear in the Rollbar dashboard within a few seconds.


In addition to catching top-level errors, you can send caught errors or custom log messages. All of the following methods are fully-asynchronous and safe to call anywhere in your code after the <script> tag above.

// Caught errors
try {
} catch (e) {
  Rollbar.error("Something went wrong", e);

// Arbitrary log messages. 'critical' is most severe; 'debug' is least.
Rollbar.critical("Connection error from remote Payments API");
Rollbar.error("Some unexpected condition");
Rollbar.warning("Connection error from Twitter API");"User opened the purchase dialog");
Rollbar.debug("Purchase dialog finished rendering");

// Can include custom data with any of the above.
// It will appear as `custom.postId` in the Occurrences tab"Post published", {postId: 123});

// Callback functions
Rollbar.error(e, function(err, data) {
  if (err) {
    console.log("Error while reporting error to Rollbar: ", e);
  } else {
    console.log("Error successfully reported to Rollbar. UUID:", data.result.uuid);

To set configuration options at runtime, use Rollbar.configure:

// Set the person data to be sent with all errors for this notifier.
  payload: {
    person: {
      id: 456,
      username: "foo",
      email: ""

(Advanced) For fine-grained control of the payload sent to the Rollbar API, you can override any keys by nesting them in the configuration under the payload key:

Rollbar.configure({payload: {fingerprint: "custom fingerprint to override grouping algorithm"}}).error(err);

Javascript Framework Support


Rollbar.js supports React applications with no additional configuration required. For apps using React 15.2 and later, production error messages are automatically decoded.

Angular 1

The community library which provides the machinery for Angular 1 support has releases for the different versions of this Rollbar.js library. Those releases lag behind releases to this library, but they are usually in sync.

Angular 2

Setting the captureUncaught option to true will result in reporting all uncaught exceptions to Rollbar by default. Additionally, one can catch any Angular 2 specific exceptions reported through the @angular/core/ErrorHandler component by setting a custom ErrorHandler class:

import Rollbar = require('rollbar');
import { BrowserModule } from '@angular/platform-browser';
import { NgModule, ErrorHandler } from '@angular/core';
import { AppComponent } from './app.component';

const rollbarConfig = {
  captureUncaught: true,
  captureUnhandledRejections: true,

export class RollbarErrorHandler implements ErrorHandler {
  constructor(private injector: Injector) { }
  handleError(err:any) : void {
    var rollbar = this.injector.get(Rollbar);
    rollbar.error(err.originalError || err);

  imports: [ BrowserModule ],
  declarations: [ AppComponent ],
  bootstrap: [ AppComponent ],
  providers: [
    { provide: ErrorHandler, useClass: RollbarErrorHandler },
    { provide: Rollbar,
      useFactory: () => {
        return new Rollbar(rollbarConfig)
export class AppModule { }


ember-cli-rollbar is a community-maintained library that enables Ember.Logger.error() to be reported to Rollbar.


Rollbar.js supports Backbone.js with no additional configuration required.

UMD / Browserify / Requirejs / Webpack

rollbar.js is also distributed using UMD, so you can use it with browserify, requirejs, webpack, or anything else that uses AMD or CommonJS modules. See the examples for details.

Disable reporting to

If you don't want to send data to Rollbar, just set the enabled flag to false for each notifier instance.

Rollbar.error("This will be reported to Rollbar");
Rollbar.configure({enabled: false});
Rollbar.error("This will *not* be reported to Rollbar");

Ignoring specific exception messages

If you want to ignore a specific exception message, say for a third-party browser plugin that is throwing errors, you can add the message to the ignoredMessages array, and Rollbar will ignore exceptions matching those messages.

var _rollbarConfig = {
  ignoredMessages: ["Can't find Clippy.bmp. The end is nigh."],
  captureUncaught: true,
  captureUnhandledRejections: false,
  payload: {
    environment: "production"
// init your rollbar like normal, or insert rollbar.js source snippet here

Handling uncaught rejections

Rollbar.js supports the ability to catch and report unhandled Promise rejections, that is, Promise failures that do not have a corresponding .then(null, function(e) {}) handler. This support is best used for handling rejected exceptions, although rejected primitives will report (without a stack trace).

If you decide to use this option, you may also want to combine it with the checkIgnore configuration option to filter 'noisy' rejections, depending on the extent to which your application handles Promise failures, or rejects with a lot of primitives.

Verbose option

If you would like to see what is being sent to Rollbar in your console, use the verbose option.

var _rollbarConfig = {
  verbose: true, // This will now log to console.log, as well as Rollbar  
  captureUncaught: true,
  captureUnhandledRejections: false,
  payload: {
    environment: "production"
// init your rollbar like normal, or insert rollbar.js source snippet here

Synchronous option

By default, the snippet loads the full Rollbar source asynchronously. You can disable this which will cause the browser to download and evaluate the full rollbar source before evaluating the rest of the page.

More information can be found here: and

var _rollbarConfig = {
  async: false,

Source Maps

If you minify your JavaScript in production, you'll want to configure source maps so you get meaningful stack traces. See the source maps guide for instructions.

Dealing with adblocker / browser extension exceptions

Unfortunately, some very popular browser extensions may modify a user's copy of your website in such a way as to break its functionality. This can result in Rollbar reporting exceptions that are not a direct result of your own code. There are multiple approaches to dealing with this issue, the simplest of which is covered in related documentation.

Configuration Reference

Configuration types

There are 2 types of configuration data – context and payload. Context provides information about the environment of the error while payload describes information about the error itself.


  • Information about the environment of the error being sent to Rollbar
  • e.g. server hostname, user's IP, custom fingerprint


  • Information about the error – usually custom
  • e.g. The name of the javascript component that triggered the error

Configuration levels

Rollbar can be configured at 3 different levels – global, notifier and scope. All configuration is inherited at each level, so global configuration affects all notifiers while notifier configuration only affects the notifier being configured and any child notifiers created after the call to configure().

Global configuration

  • Affects all notifiers
  • Set by calling global() on any notifier
  • Merges/updates previous configuration
  • Currently, the only supported options are maxItems and itemsPerMinute

Notifier configuration - context and/or payload

  • Affects only the notifier you call configure() on
  • Merges/updates previous configuration for the notifier you call configure() on



// Only send a max of 5 items to Rollbar per minute{itemsPerMinute: 5});


// Set the top-level notifier's checkIgnore() function
Rollbar.configure({checkIgnore: function(isUncaught, args, payload) {
    // ignore all uncaught errors and all 'debug' items
    return isUncaught === true || === 'debug';

// Set the environment, default log level and the context
Rollbar.configure({logLevel: 'info', payload: {environment: 'staging', context: 'home#index'}});
Rollbar.log('this will be sent with level="info"');

// Only send "error" or higher items to Rollbar
Rollbar.configure({reportLevel: 'error'});'this will not get reported to Rollbar since it\'s at the "info" level');

// Set the person information to be sent with all items to Rollbar
Rollbar.configure({payload: {person: {id: 12345, email: ''}}});

// Add the following payload data to all items sent to Rollbar from this
// notifier or any created using window.Rollbar.scope()
Rollbar.configure({payload: {sessionId: "asdf12345"}});

// Scrub any payload keys/query parameters named 'creditCardNumber'
Rollbar.configure({scrubFields: ['creditCardNumber']});


Both global and context configuration have the following reserved key names that Rollbar uses to aggregate, notifiy and display.



Max number of items to report per minute. The limit counts uncaught errors (reported through window.onerror) and any direct calls to Rollbar.log/debug/info/warning/error/critical(). This is intended as a sanity check against infinite loops, but if you're using Rollbar heavily for logging, you may want to increase this.

If you would like to remove this limit, set it to undefined.

Default: 60


Max number of items to report per page load. When this limit is reached, an additional item will be reported stating that the limit was reached. Like itemsPerMinute, this limit counts uncaught errors (reported through window.onerror) and any direct calls to Rollbar.log/debug/info/warning/error/critical().

Default: 0 (no limit)



An optional function that will be used to ignore uncaught exceptions based on its return value. The function signature should be: function checkIgnore(isUncaught, args, payload) { ... } and should return true if the error should be ignored.

Default: null

  • isUncaught: true if the error being reported is from the window.onerror hook.
  • args: The arguments to Rollbar.log/debug/info/warning/error/critical(). In the case of unhandled rejections, the last parameter is originating Promise.
  • payload: The javascript object that is about to be sent to Rollbar. This will contain all of the context and payload information for this notifier and error. This parameter is useful for advanced ignore functionality.

If set to false, no data will be sent to Rollbar for this notifier. Note: callbacks for errors will not be called if this is set to false.

Default: true


Check payload frames for white listed domains. This is an array of strings, each of which get compiled to a Regexp. If no file in the trace matches one of these domains the payload is ignored.


The severity level used for calls to Rollbar.log(). One of "critical", "error", "warning", "info", "debug".

Default: "debug"


Used to filter out which messages will get reported to Rollbar. If set to "error", only "error" or higher serverity level items will be sent to Rollbar.

Default: "warning"


A list containing names of keys/fields/query parameters to scrub. Scrubbed fields will be normalized to all * before being reported to Rollbar. This is useful for sensitive information that you do not want to send to Rollbar. e.g. User tokens

Default: ["passwd", "password", "secret", "confirm_password", "password_confirmation"]


Optional function to modify the payload before sending to Rollbar.

Default: null

// For example:
// Set a custom fingerprint
var transformer = function(payload) { = 'my custom fingerprint';

Rollbar.configure({transform: transformer});
// OR
var _rollbarConfig = {
  // ...
  transform: transformer

The severity level used when uncaught errors are reported to Rollbar.

Default: "error"


The url to which items get POSTed. This is mostly relevant to our enterprise customers. You will, however, need this if you're proxying the requests through your own server, or you're an enterprise customer.

Default: ''


These keys should all be within the payload key.


  payload: {
    person: ...,
    context: ...

An object identifying the logged-in user, containing an id (required), and optionally a username and email (all strings). Passing this will allow you to see which users were affected by particular errors, as well as all the errors that a particular user experienced.


Name of the page context – i.e. route name, url, etc. Can be used in the Rollbar interface to search for items by context prefix.


An object describing properties of the client device reporting the error.

This object should have a key that points to another object, javascript which describes properties of the javascript code/environment to Rollbar.

client.javascript supports the following properties:


Version control number (i.e. git SHA) of the current revision. Used for linking filenames in stacktraces to GitHub.


When true, the Rollbar service will attempt to find and apply source maps to all frames in the stack trace.

Default: false


When true, the Rollbar service will attempt to apply source maps to frames even if they are missing column numbers. Works best when the minified javascript file is generated using newlines instead of semicolons.

Default: false


  scrubFields: ["creditCard"], // "creditCard" will be added to the list of default scrubFields
  payload: {
    client: {
      javascript: {
        code_version: "ce0227180bd7429fde128f6ef8fad77396d8fbd4",  // Git SHA of your deployed code
        source_map_enabled: true,
        guess_uncaught_frames: true

An object describing properties of the server that was used to generate the page the notifier is reporting on.

The following properties are supported:


The name of the branch of the code that is running. Used for linking filenames in stacktraces to GitHub.

Default: "master"


The hostname of the machine that rendered the page

e.g. ""

e.g. in Python, use socket.gethostname()


  logLevel: "warning", // Rollbar.log() will be sent with a level = "warning"
  payload: {
    server: {
      branch: "master",
      host: ""

More info

Check out the API reference below for more information on how to use global/configure/scope().

API Reference

(See the section on configuration above.)

Note: This method will update any existing global configuration.

Returns: undefined


  1. options: Object - A javascript object that contains global configuration.


(See the section on configuration.)

Note: This method will update any existing configuration for the Rollbar instance used.

Returns: undefined


  1. options: Object - A javascript object that contains the notifier configuration.


This method is used to record uncaught exceptions from window.onerror. The Rollbar snippet will set window.onerror = Rollbar.uncaughtError if it was configured to do so via the captureUncaught config parameter given to the constructor of this Rollbar instance.

Returns: undefined


  1. message: String: The error message.
  2. url: String: url that the error occurred on.
  3. lineNo: Integer: The line number, (if known) that the error occurred on.
  4. colNo: Integer: The column number that the error occurred on.
    1. Note: Only newer browsers provide this variable.
  5. err: Exception: The exception that caused the window.onerror event to occur.
    1. Note: Only newer browsers provide this variable.


This method is used to record unhandled Promise rejections via the window event unhandledrejection. Many promise libraries, including Bluebird, lie, and native Promise support (Chrome only currently, but it is a standard to be built upon).

To enable this handling, you should provide captureUnhandledRejections to the config given to this Rollbar constructor.

Returns: undefined


  1. message: Exception: The exception, or rejection being rejected.
  2. promise: Promise: The originating promise object.


Log a message and potentially send it to Rollbar. The level that the message or error is logged at is determined by the logLevel config option.

In order for the message to be sent to Rollbar, the log level must be greater than or equal to the reportLevel config option.

See configuration for more information on configuring log levels.

Returns: undefined


Note: order does not matter

  • message: String - The message to send to Rollbar.
  • err: Exception - The exception object to send.
  • custom: Object - The custom payload data to send to Rollbar.
  • callback: Function - The function to call once the message has been sent to Rollbar.


Log a debug message
// By default, the .log() method uses the 
// "debug" log level and "warning" report level 
// so this message will not be sent to Rollbar.
Rollbar.log("hello world!");
Log a warning along with custom data
Rollbar.configure({logLevel: "warning"});
Rollbar.log("Uh oh! The user pressed the wrong button.", {buttonId: "redButton"});

Log a debug message along with an error

try {
} catch (e) {
  Rollbar.log("Caught an exception", e);
Log an error and call a function when the error is reported to Rollbar
Rollbar.configure({logLevel: "error"});

function continueFormSubmission() {
  // ...

try {
} catch (e) {
  Rollbar.log(e, continueFormSubmission);

Rollbar.debug/ info/ warn/ warning/ error/ critical()

These methods are all shorthand for Rollbar.log() with the appropriate log level set.



If you use jQuery 1.7 and up, you can include a plugin script that will instrument jQuery to wrap any functions passed into jQuery's ready(), on() and off() to catch errors and report them to Rollbar. To install this plugin, copy the following snippet into your pages, making sure it is BELOW the <script> tag where jQuery is loaded:

// Rollbar jQuery Snippet
!function(r){function t(n){if(e[n])return e[n].exports;var a=e[n]={exports:{},id:n,loaded:!1};return r[n].call(a.exports,a,a.exports,t),a.loaded=!0,a.exports}var e={};return t.m=r,t.c=e,t.p="",t(0)}([function(r,t,e){"use strict";!function(r,t,e){var n=t.Rollbar;if(n){var a="0.0.8";n.configure({payload:{notifier:{plugins:{jquery:{version:a}}}}});var o=function(r){if(n.error(r),t.console){var e="[reported to Rollbar]";n.options&&!n.options.enabled&&(e="[Rollbar not enabled]"),t.console.log(r.message+" "+e)}};r(e).ajaxError(function(r,t,e,a){var o=t.status,u=e.url,i=e.type;if(o){var s={status:o,url:u,type:i,isAjax:!0,,jqXHR_responseText:t.responseText,jqXHR_statusText:t.statusText},d=a?a:"jQuery ajax error for "+i;n.warning(d,s)}});var u=r.fn.ready;r.fn.ready=function(r){return,function(t){try{r(t)}catch(e){o(e)}})};var i=r.event.add;r.event.add=function(t,e,n,a,u){var s,d=function(r){return function(){try{return r.apply(this,arguments)}catch(t){o(t)}}};return n.handler?(s=n.handler,n.handler=d(n.handler)):(s=n,n=d(n)),s.guid?n.guid=s.guid:n.guid=s.guid=r.guid++,,t,e,n,a,u)}}}(jQuery,window,document)}]);
// End Rollbar jQuery Snippet

The plugin will also automatically report any AJAX errors using jQuery's ajaxError() handler. You can disable this functionality by configuring the Rollbar notifier with the following:

  plugins: {
    jquery: {
      ignoreAjaxErrors: true


See here for some examples of how to use rollbar.js with Bower, Browserify, RequireJS, Webpack, and others.

Quick Start Server

The recommended way to use the rollbar constructor is to pass an object which represents the configuration options with at least the one required key accessToken with the value equal to your POST_SERVER_ITEM_ACCESS_TOKEN. If you do not want to pass any configuration options, then for convenience, you can simply pass just the access token as a string as the only argument to the constructor.

var Rollbar = require('rollbar');
var rollbar = new Rollbar({
  handleUncaughtExceptions: true,
  handleUnhandledRejections: true

// log a generic message and send to rollbar
rollbar.log('Hello world!');

Setting the handleUncaughtExceptions option to true will register Rollbar as a handler for any uncaught exceptions in your Node process.

Similarly, setting the handleUnhandledRejections option to true will register Rollbar as a handler for any unhandled Promise rejections in your Node process.

Be sure to replace POST_SERVER_ITEM_ACCESS_TOKEN with your project's post_server_item access token, which you can find in the interface.

Server Installation

Install using the node package manager, npm:

$ npm install --save rollbar

Server Configuration

Using Express

var express = require('express');
var Rollbar = require('rollbar');
var rollbar = new Rollbar('POST_SERVER_ITEM_ACCESS_TOKEN');

var app = express();

app.get('/', function(req, res) {
  // ...

// Use the rollbar error handler to send exceptions to your rollbar account


Using Hapi

#!/usr/bin/env node

var Hapi = require('hapi');
var server = new Hapi.Server();
server.connection({ host:'localhost', port:8000 });

// Begin Rollbar initialization code
var Rollbar = require('rollbar');
var rollbar = new Rollbar('POST_SERVER_ITEM_ACCESS_TOKEN');
server.on('request-error', function(request, error) {
  // Note: before Hapi v8.0.0, this should be 'internalError' instead of 'request-error'
  var cb = function(rollbarErr) {
    if (rollbarErr)
      console.error('Error reporting to rollbar, ignoring: '+rollbarErr);
  if (error instanceof Error)
    return rollbar.error(error, request, cb);
  rollbar.error('Error: '+error, request, cb);
// End Rollbar initialization code

  method: 'GET',
  handler: function (request, reply) {
    throw new Error('Example error manually thrown from route.');
server.start(function(err) {
  if (err)
    throw err;
  console.log('Server running at:',;


In your main application, require and construct a rollbar instance using your access_token::

var Rollbar = require("rollbar");
var rollbar = new Rollbar("POST_SERVER_ITEM_ACCESS_TOKEN");

Other options can be passed into the constructor using a second parameter. E.g.:

// Configure the library to send errors to
new Rollbar({
  environment: "staging",
  endpoint: ""

Server Usage

Caught exceptions

To report an exception that you have caught, use one of the named logging functions (log/debug/info/warning/error/critical) depending on the level of severity of the exception.

var Rollbar = require('rollbar');
var rollbar = new Rollbar('POST_SERVER_ITEM_ACCESS_TOKEN');

try {
} catch (e) {

  // if you have a request object (or a function that returns one), pass it as the second arg
  // see below for details about what the request object is expected to be
  rollbar.error(e, request);

  // you can also pass a callback, which will be called upon success/failure
  rollbar.error(e, function(err2) {
    if (err2) {
      // an error occurred
    } else {
      // success

  // if you have a request and a callback, pass the callback last
  rollbar.error(e, request, callback);

  // to specify payload options - like extra data, or the level - pass a custom object as the third argument. The second argument must be a request or null
  rollbar.error(e, request, {level: "info"});
  rollbar.error(e, null, {level: "warning", custom: {someKey: "arbitrary value"}});

  // you can also pass a callback as the last argument
  rollbar.error(e, null, {level: "info"}, callback);
  rollbar.error(e, request, {level: "info"}, callback);

Log messages

To report a string message, possibly along with additional context, use (log/debug/info/warning/error/critical) depending on the level of severity to attach to the message.

var Rollbar = require('rollbar');
var rollbar = new Rollbar('POST_SERVER_ITEM_ACCESS_TOKEN');

// reports a string message at the default severity level ("error")
rollbar.log("Timeout connecting to database");

// reports a string message at the specified level, along with a request and callback
// only the first param is required
rollbar.debug("Response time exceeded threshold of 1s", request, callback);"Response time exceeded threshold of 1s", request, callback);
rollbar.warning("Response time exceeded threshold of 1s", request, callback);
rollbar.error("Response time exceeded threshold of 1s", request, callback);
rollbar.critical("Response time exceeded threshold of 1s", request, callback);

// reports a string message along with additional data conforming to the Rollbar API Schema
// documented here:
  "Response time exceeded threshold of 1s",
    threshold: 1,
    timeElapsed: 2.3
  }, callback

The Request Object

If your Node.js application is responding to web requests, you can send data about the current request along with each report to Rollbar. This will allow you to replay requests, track events by browser, IP address, and much more.

All of the logging methods accept a request parameter as the second argument.

If you're using Express, just pass the express request object. If you're using something custom, pass an object with these keys (all optional):

  • headers: an object containing the request headers
  • protocol: the request protocol (e.g. "https")
  • url: the URL starting after the domain name (e.g. "/index.html?foo=bar")
  • method: the request method (e.g. "GET")
  • body: the request body as a string
  • route: an object containing a 'path' key, which will be used as the "context" for the event (e.g. {"path": "home/index"})

Sensitive param names will be scrubbed from the request body and, if scrubHeaders is configured, headers. See the scrubFields and scrubHeaders configuration options for details.

Person Tracking

If your application has authenticated users, you can track which user ("person" in Rollbar parlance) was associated with each event.

If you're using the Passport authentication library, this will happen automatically when you pass the request object (which will have "user" attached). Otherwise, attach one of these keys to the request object described in the previous section:

  • rollbar_person or user: an object like {"id": "123", "username": "foo", "email": ""}. id is required, others are optional.
  • user_id: the user id as an integer or string, or a function which when called will return the user id

Note: in Rollbar, the id is used to uniquely identify a person; email and username are supplemental and will be overwritten whenever a new value is received for an existing id. The id is a string up to 40 characters long.

Upgrading from node_rollbar

The upgrade path from node_rollbar version 0.6.4 to version 2.0.0 of this library is not automatic, but it should be straightforward. The main changes are related to naming, however we also changed the library from being a singleton to being used via individual instances. As we have said above, the recommended way to use the constructor is to pass an object which represents the configuration options with the access token contained within. The old style was to always pass the access token as the first parameter, we permit this style for convenience when no other options are necessary to ease the migration path, but for new code one should use an object as the only argument.


var rollbar = require("rollbar");
rollbar.reportMessage("Hello world!");


var Rollbar = require("rollbar");
var rollbar = new Rollbar("POST_SERVER_ITEM_ACCESS_TOKEN");
rollbar.log("Hello world!");
  • Instead of importing the library as a singleton upon which you act, you are now importing a constructor.
  • The constructor is a function of the form function (options) where options is an object with the same configuration options as before, and also requires a key accessToken with your access token as the value.
  • reportMessage, reportMessageWithPayloadData, handleError, and handleErrorWithPayloadData are all deprecated in favor of: log/debug/info/warning/error/critical
  • Each of these new logging functions can be called with any of the following sets of arguments:
    • message/error, callback
    • message/error, request
    • message/error, request, callback
    • message/error, request, custom
    • message/error, request, custom, callback
  • In other words, the first arugment can be a string or an exception, the type of which will be used to subsequently construct the payload. The last argument can be a callback or the callback can be omitted. The second argument must be a request or null (or a callback if only two arguments are present). The third argument is treated as extra custom data which will be sent along with the payload. Note that to include custom data and no request, you must pass null for the second argument.

The other major change is that if you wish to capture uncaught exceptions and unhandled rejections, you now use a configuration option.


rollbar.handleUncaughtExceptionsAndRejections("POST_SERVER_ITEM_ACCESS_TOKEN", options);


var rollbar = new Rollbar({
  handleUncaughtExceptions: true,
  handleUnhandledRejections: true

We have also changed the minimumLevel configuration option to reportLevel in order to match the configuration option currently in use by the browserjs library.

Now that we have said the above, because of how one might be using the library currently, converting to not use a singleton may be problematic. Therefore, we provide a convenient interface to what is essentially a singleton managed by the library. First, you would use this code somewhere before any other instances of rollbar are required or used:

const Rollbar = require('rollbar');

const rollbar = Rollbar.init({
  handleUncaughtExceptions: true

Then, in other places, you can use:

const Rollbar = require('rollbar');

Rollbar.log('hello world');

Help / Support

If you run into any issues, please email us at

You can also find us in IRC: #rollbar on

For bug reports, please open an issue on GitHub.


To set up a development environment, you'll need Node.js and npm.

  1. git submodule update --init
  2. npm install -D
  3. make

To run the tests, run make test


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature).
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request