Guide to importing external CSS styles into Angular 2 using the require method

I'm facing an issue with loading an external css file in different environment files. My setup includes two environments: development and production. Loading the css file locally works fine in development mode, but not in production mode.

environment.dev.ts

require("style-loader!./../assets/style.css");

environment.prod.ts

require("style-loader!http://abc/style.css");

This results in the following error:

Can't resolve ''

Any suggestions on how to make it work with a URL?

Thanks!

UPDATE

Following Milad's suggestion, I attempted to use a dynamic href link:

<link [attr.href]="getCss()" type="text/css">

function getCss(): string {
    return this.mode === 'dev' ?
        'assets/style.css':
        'http://abc/sprite.css';
}

However, this led to the error:

unsafe value used in a resource URL context

javascriptcssangularwebpackstyles

Answer №1

It is not recommended to include http calls in your webpack loader configuration as that loader may not be available in your production environment.

Therefore, using something like

require("style-loader!http://abc/style.css");

Essentially tells webpack to fetch the CSS from a specified URL while building your application bundle.

However, this approach is discouraged because webpack should not rely on external calls for bundling pieces of your project.

Instead, consider downloading the CSS files and directly including them in your code.

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