Issues arise in Typescript single-page applications due to the use of application insights

Currently, I am developing a single-page HTML application using TypeScript in VSCode.

Initially, the app was running smoothly without any errors or warnings. However, I decided to incorporate Azure Application Insight into the project.

To integrate it, I used the command: npm install --save @microsoft/applicationinsights-web

After installation, new folders named applicationinsights were created under node_modules and @types\applicationinsights, along with several "applicationinsights-*-js" folders under node_modules@microsoft.

Prior to adding any code related to Azure Application Insight, I imported { ApplicationInsights } from "@microsoft/applicationinsights-web".

Following this step, while tsc did not display any errors, the Problems tab in VSCode presented 121 errors, particularly indicating that my main objects were no longer recognized, causing the app to fail to start.

In an attempt to resolve this issue, I made changes to the tsconfig.json file by setting "target": "ES2022", "module": "ES6", and "moduleResolution": "node". Unfortunately, this adjustment did not solve the problem.

I would greatly appreciate it if someone could assist me in understanding the root of this issue.

typescriptvisual-studio-codeazure-application-insights

Answer №1

The issue arises from TypeScript's inability to recognize the data types provided by the installed package.

  • To address this problem, I set up a sample project called my-azure-appinsights and included TypeScript as a development dependency: 
    npm install --save-dev typescript

This is the content of my TypeScript configuration file: tsconfig.json

{
  "compilerOptions": {
    
    "target": "ES2022",                                  
    "module": "ES6",                                
    "moduleResolution": "node",
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "strict": true,                                      
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  }
}

package.json:

{
  "name": "my-azure-appinsights",
  "version": "1.0.0",
  "description": "Example project showcasing Azure Application Insights",
  "main": "test.ts", 
  "type": "module", 
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@types/applicationinsights": "^0.20.0",
    "typescript": "^5.2.2"
  },
  "dependencies": {
    "@microsoft/applicationinsights-web": "^3.0.5"
  }
}

test.ts file:

import { ApplicationInsights } from "@microsoft/applicationinsights-web";

// Initializing Application Insights
const appInsights = new ApplicationInsights({
  config: {
    instrumentationKey: "YOUR_INSTRUMENTATION_KEY",
  },
});

// Commencing telemetry data tracking
appInsights.loadAppInsights();

// Example event tracking
appInsights.trackEvent({ name: "SampleEvent" });

I compile TypeScript to JavaScript using npx tsc

Upon executing the application with node test.js, I'm able to retrieve the customized event logs as configured in the application.

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