Can we verify the availability of an Angular library during runtime?

I am in the process of creating a custom Angular library, let's name it libA, which has the capability to utilize another Angular library, named libB, for an optional feature. Essentially, if the Angular application does not include libB, then the feature within libA will remain disabled. However, if the Angular app does have libB integrated, then the feature in libA will become accessible.

To achieve this functionality, I need to implement checks within libA to verify the presence of libB. However, I am unsure how to effectively determine whether or not libB is installed in the application.

If anyone has insight on how I can confirm the existence of libB within the application from within libA, I would greatly appreciate your guidance!

angulartypescript

Answer №1

projects/libA/package.json

{
    "name": "libA",
    "version": "1.0.0",
    "peerDependencies": {
        "libC": "1.0.0"
    },
    "dependencies": {
        "tslint": "^3.0.0"
    },
    "publishConfig": {
        "registry": "http://10.20.30.40:4873"
    }
}

For detailed information on setting up an Angular project as a dependency in another Angular project, check out this resource: How to setup angular project as a dependency in package.json of another angular project

My approach involves:

To manage packages effectively, I have set up my own registry similar to on a dedicated Linux VM. Here is how I handle each package:

{
    "name": "@my-company/package-name",
    "version": "1.0.0",
    "peerDependencies": {
       ...
    },
    "dependencies": {
        "tslint": "^3.0.0"
    },
    "publishConfig": {
        "registry": "http://10.20.30.40:4873"
    }
}

$ ng build <package-name>
$ cd /path/to/dist/package-name
$ npm publish

In the Angular project:

$ npm login --scope=@my-company --registry=http://10.20.30.40:4873/
$ npm install @my-company/package-name

(I have experimented with various configurations for the registry setup, so logging in might not be the only step required. But hey, it's all part of the learning process! :D)

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