Issue with Angular not functioning properly in IE 11 across both production and development builds

After updating my global angular-cli version to 8, I encountered an error in IE11 when building my project in production mode. Interestingly, the project works fine in Chrome.

The error message for the production version is as follows:

https://i.sstatic.net/AFxNY.png I also checked the project in my local development environment and the issue persisted there too.

https://i.sstatic.net/j7gG4.png

The error is being thrown at this specific line in the vendor.js file:

const isPresent = (value) => value !== null && value !== undefined;

Here is a look at my package.json:

{
   // package.json content
}

My polyfills.ts file contains necessary browser polyfills for Angular along with application imports:

{
    // polyfill.ts content
}

Node Version: v12.16.0 Angular Cli Version: Local -- 6.2.9 and Global -- 8.3.25

Your insight and assistance on resolving this error would be greatly appreciated. Thank you!

Answer №1

The reason for this issue could possibly be due to utilizing the global version of CLI when building the application. It is recommended to stick to the same version of CLI that was used to create the Angular application. To build the application correctly, try running the following command from the project directory:

cd project_folder    
npm run build

By doing so, you will ensure that the local Angular CLI "@angular/cli": "^6.2.5" is utilized instead of the global version.

For a production build, use the following command:

npm run build -- --prod --base-href=/AngularModules/

Directly using the 'ng' command in the command prompt will default to the global version, rather than the locally installed version. Utilizing npm scripts guarantees the usage of the local version.

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