An Angular quick tip I discovered today was if you have an application with many third-party libraries that use CommonJS instead of ES modules. You can add the names of these libraries to the "allowedCommonJsDependencies" option in the builder settings in Angular.json.
This helps remove all the warnings in your build, it is basically telling Angular that these libraries are ok to use CommonJS for now until they are updated.
This is great if you are updating an Angular app, but don’t want to go through and update all the dependencies that are still using the CommonJS approach. Then over time as you update these libraries they can be removed from the "allowedCommonJsDependencies" array.
Here’s a link to the official Angular docs on this – https://angular.io/guide/build#configuring-commonjs-dependencies