AppSignal

@appsignal/reactAppSignal.com websiteDocumentationSupportThe @appsignal/javascript integration for React v15+.See also the mono repo README for more information.InstallationAdd the @appsignal/react and @appsignal/javascript packages to your package.json. Then, run yarn install/npm install.You can also add these packages to your package.json on the command line:yarn add @appsignal/javascript @appsignal/reactnpm install --save @appsignal/javascript @appsignal/reactUsageError BoundaryIf you are using React v16 or higher, you can use the ErrorBoundary component to catch errors from anywhere in the child component tree.import React from "react"import ReactDOM from "react-dom"import Appsignal from "@appsignal/javascript"import { ErrorBoundary } from "@appsignal/react"const appsignal = new Appsignal({ key: "YOUR FRONTEND API KEY"})const FallbackComponent = () => ( div>Uh oh! There was an error :(div>)const App = () => ( ErrorBoundary instance={appsignal} fallback={(error) => FallbackComponent />}> { /** Child components here **/} ErrorBoundary>)ReactDOM.render(App />, document.getElementById("root"))Legacy Boundary⚠️ WARNING: The API that this component uses is unstable at this point in React's development. We offer this component as a means to support those running React v15, but do not guarantee its reliablity. You are encouraged to use the ErrorBoundary whenever possible.The LegacyBoundary works in almost exactly the same way as the ErrorBoundary:import React from "react"import ReactDOM from "react-dom"import Appsignal from "@appsignal/javascript"import { LegacyBoundary } from "@appsignal/react"const appsignal = new Appsignal({ key: "YOUR FRONTEND API KEY"})const FallbackComponent = () => ( div>Uh oh! There was an error :(div>)const App = () => ( LegacyBoundary instance={appsignal} fallback={(error) => FallbackComponent />}> { /** Child components here **/} LegacyBoundary>)ReactDOM.render(App />, document.getElementById("root"))DevelopmentInstallationMake sure mono is installed and bootstrapped, see the project README's development section for more information.You can then run the following to start the compiler in watch mode. This automatically compiles both the ES Module and CommonJS variants:You can also build the library without watching the directory:yarn build # build both CJS and ESMyarn build:cjs # just CJSyarn build:esm # just ESMTestingThe tests for this library use Jest as the test runner. Once you've installed the dependencies, you can run the following command in the root of this repository to run the tests for all packages, or in the directory of a package to run only the tests pertaining to that package:VersioningThis repo uses Semantic

AppSignal helps your team communicate without any effort, keeping allcommunication and context in one place. We help your team spend lesstime in meetings, find the right information faster, andmaintain focus on the code that helps your business grow.Works where your team worksAppSignal integrates with the most common developer tools forcollaboration and communication. With a few clicks, you'll be sendingalerts and incidents to your tools of choice.Send issues to your issue trackerSend AppSignal incidents to your external issue tracker. We'll create anew issue/ticket with all the details and a link back to AppSignal. Here's a list of services we integrate with:AsanaShortcutFlowdockGitHubGitLabJiraPhabricatorPivotal TrackerTrelloSend notifications to your chat applicationA little secret: we don't really love email ourselves. Getting direct notifications ina chat application of your choice is an easier way to manage alerts. AppSignal also has powerful ways to set upyour notifications, so your communication channel isn't spammed all day long.Here's a full list of tools we integrate with:DiscordGoogle Hangouts ChatIntercomMicrosoft TeamsOpsGeniePagerDutySlackSquadcastWebhookSharing information around incidentsSharing information about incidents often happens in informal ways. Achat message in Slack, an issue on Github, or an email thread with a fewdevelopers. AppSignal has great features around communication andknowledge sharing. Your team can now gather all information in one placeinstead of going on an information treasure hunt.Add incident descriptionsFirst of all, every error or performance issue has a textfield to add anincident description. This is a great place to suggest steps fordebugging, or sharing a fix in case this error occurs again. When usingthe Anomaly Detection feature,

LearnDocsBlogPricingLoginStart free trialAppSignal is all about building better apps. In our Academy series, we'll explore application stability and performance, and explain core programming concepts.AllAppSignal UpdatesRubyElixirJavaScriptPythonAPM AcademyMore articlesJul 31, 2024Monitor the Performance of Your Python Django App with AppSignalJul 31, 2024Setting Up Custom Metrics with Effective Alerts for a Ruby App in AppSignalJul 10, 2024Monitor the Performance of your Python FastAPI App with AppSignalJun 12, 2024Monitor the Performance of Your Ruby on Rails Application Using AppSignalMay 29, 2024Getting Started: Your Ruby On Rails App Hosted On DigitalOcean With AppSignalMay 29, 2024Track Errors in Your Python Flask Application with AppSignalMar 28, 2024Tracking Custom Metrics in Python with AppSignalMar 27, 2024Track Errors in FastAPI for Python with AppSignalFeb 28, 2024Track Errors in Your Python Django Application with AppSignalDec 13, 2023AppSignal Expands Monitoring Capabilities with VectorNov 22, 2023Shaping the Future of Ruby and Kafka Together with rdkafka-rubyJul 26, 2023Track Errors in Fastify with AppSignalJul 18, 2023Observe Your Phoenix App with Structured LoggingMay 31, 2023Set Up Tracing for a Node.js Application on AppSignalMay 18, 2023Transport Your Logs to AppSignal with WinstonApr 26, 2023How to Monitor Custom Metrics with AppSignalApr 19, 2023Node.js Pitfalls to AvoidApr 18, 2023Optimize Your Prisma Queries with AppSignal and OpenTelemetryApr 05, 2023Monitor the Health of Your Node.js ApplicationApr 04, 2023Monitor NGINX Performance Automatically with AppSignalMar 22, 2023Introducing AppSignal LoggingFeb 22, 2023Track Errors in Your NestJS Application with AppSignalFeb 14, 2023Introducing AppSignal for HanamiFeb 08, 2023An Introduction to Application MonitoringFeb 07, 2023AppSignal for Elixir Now Supports ObanJan 30, 2023Monitoring Your NestJS Application with

New Error("Oops");};const funcTwo = async () => { await Promise.resolve(); await funcThree();};const funcOne = async () => { await new Promise((resolve) => setTimeout(resolve, 10)); await funcTwo();};const init = async () => { await new Promise((resolve) => setTimeout(resolve, 10)); await funcOne();};init().then( () => console.log("success"), (error) => console.error(error.stack));">This results in an output like so:If we run the same code on a version of Node.js older than 12, the output looks like this:">In this case, at isn’t very helpful in revealing the full context of the error.However, this works differently with async stack traces. When an error occurs in a callback function, the call stack is captured at the point when a callback is scheduled (the init() function in this case), rather than when it is executed.Set Up AppSignal for Your Express.js AppAppSignal can assist you in identifying and troubleshooting problems with your app, including issues related to slow performance, errors, crashes, and downtime. You can resolve these issues quickly before they negatively impact your users.In this tutorial, we will walk you through how to integrate AppSignal into your Express.js app.Note: You can follow along with the source code for the following tutorial here.Firstly, sign up for an account on appsignal.com and create a new app by following these guides.Then start a new Node.js project:Install AppSignal for Node.js:In your repo’s root directory, create an appsignal.cjs file and paste the following code to require and configure AppSignal:Note: An application's Push API key is given during setup and can be found in the App settings > Push & deploy tab.In your package.json file, edit the start script to load AppSignal's configuration before any other library using the --require flag, like so:Integrating AppSignal into your Express app is very easy. You just need to require the expressErrorHandler module and then use it in your app with app.use, as shown below:The expressErrorHandler module consists of middleware designed to forward any errors in your Express application to AppSignal.Tracking Async Callback Errors with AppSignalLet's create an error inside an asynchronous callback to see how AppSignal handles it: { await Promise.resolve(); throw new Error("Oops");};const funcTwo = async () => {

Key NestJS monitoring featuresError trackingTrack NestJS errors and receive alerts when they occur. Learn morePerformance monitoringMonitor the performance of your app, and use deep insights to find and fix issues like slow database queries, memory leaks and slow controller actions. Learn moreAnomaly detectionKeep one step ahead with metric triggers that notify you when anomalies occur. Learn moreMetric dashboardsVisually monitor your NestJS app's health with metric dashboards. Learn moreIn-depth NestJS monitoringSquash bugs before they biteSwiftly identify and address issues in your NestJS application. AppSignal's Error Tracking provides deep insights for data-driven debugging.Real-time metrics at your FingertipsMonitor your NestJS application's health with up-to-the-minute insights. AppSignal's performance samples make it easy to evaluate request and response performance.Stay alert with triggersProactively monitor your NestJS application. Create triggers to alert you of anomalies in key performance metrics and be the first to know when something goes wrong.Instant downtime alertsDon't worry about downtime with AppSignal's Uptime Monitoring. AppSignal regularly checks your app from various locations, immediately notifying you if no response is detected.Streamlined log managementEasily send your logs to AppSignal with little setup. AppSignal's intuitive UI helps you quickly inspect and filter through your logs to find issues.Why monitor NestJS?Level-up your NestJS application's performance with AppSignal's Node.js APM. Get the insights you need to find and fix performance bottlenecks, bugs, exceptions, and sluggish database queries.With features like Error Tracking, Anomaly Detection, Uptime Monitoring and Logging, AppSignal helps you confidently scale your NestJS application.AppSignal NestJS monitoring helps youTrack errors and use Backtrace links and other insights to drill down to the exact cause of an error.Detect and optimize slow database queries.Spot and solve critical failures to avoid downtime.Detect memory leaks and ensure optimal memory allocation.Optimize your development flow by integrating your monitoring with GitHub, Slack, Discord, Jira, and more.Identify and improve the performance of slow functions with