The issue with importing fonts in CSS causing an error is encountered when utilizing an exported Angular library

I have a components library for Angular that relies on line-awesome icons. To include the necessary fonts and styles, I am using a CDN in the main SCSS file as shown below:

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@200;300;400;600;700;800;900&display=swap');

@import url('https://cdnjs.cloudflare.com/ajax/libs/line-awesome/1.3.0/line-awesome/css/line-awesome.min.css');

Everything functions correctly when I run the application locally, with both the Nunito font and icons loading properly. However, when attempting to import the library from an external project, I encounter an issue where the icons do not render and the browser console displays this error:

"Refused to apply style from 'http://localhost:4200/fonts/line-awesome/css/line-awesome.min.css' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled."

I am puzzled by why the first font loads without issues while the second does not, appearing as text/html instead of text/css. Additionally, it is confusing to see the Google font downloading from the CDN while the second import tries to fetch the font locally (http://localhost:4200/fonts/...)

https://i.sstatic.net/hWoA6.png

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

Although I could resolve this by directly adding the CSS file in the "styles" property of angular.json, I prefer not to impose specific configurations on applications using my library.

cssangularsassfonts

Answer №1

Have you considered including the following in your AppModule's providers array to potentially address this issue? It involves utilizing a hash location strategy:

@NgModule({
   declarations:[...],
   providers:[
      ...,
      {provide: LocationStrategy, useClass: HashLocationStrategy},
   ],
   ...
})

Answer №2

After some investigation, I discovered that the issue stemmed from not having the ahead-of-time (AOT) compilation option enabled. By adding "aot": true to the angular.json file under the development configuration, the CSS files are now being correctly downloaded.

Since the aot property is automatically set to true in production mode, this solution works well for my needs.

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