How to import CSS from node_modules in webpack angular2 app
It is possible by using @import '~bootstrap/dist/css/bootstrap.css'; on the styles.css file. (Note the ~)
Edit: How it works - The '~' is an alias set on the webpack config pointing to the assets folder... simple as that..
Edit 2: Example on how to configure webpack with the '~' alias...this should go on the webpack config file (usually webpack.config.js)...
// look for the "resolve" property and add the following...// you might need to require the asset like '~/bootsrap/...'resolve: { alias: { '~': path.resolve('./node_modules') }}
You won't be able to import any css to your vendors file using that stack, without making some changes.
Why? Well because this line:
import 'bootstrap/dist/css/bootstrap.css';It's only importing your css as string, when in reality what you want is your vendor css in a style tag. If you check config/webpack.commons.js you will find this rule:
{ test: /\.css$/, loaders: ['to-string-loader', 'css-loader'] },This rule allows your components to import the css files, basically this:
@Component({ selector: 'app', encapsulation: ViewEncapsulation.None, styleUrls: [ './app.component.css' // this why you import css as string ],In the AppComponent there's no encapsulation, because of this line encapsulation: ViewEncapsulation.None, which means any css rules will be applied globally to your app. So you can import the bootstrap styles in your app component:
@Component({ selector: 'app', encapsulation: ViewEncapsulation.None, styleUrls: [ './app.component.css', '../../node_modules/bootstrap/dist/css/bootstrap.css' ],But if you insist in importing to your vendor.ts then you will need to install a new loader, npm i style-loader --save-dev this will allow webpack to inject css to your page. Then you need to create a specific rule, on your webpack.common.js and change the existing one:
{ //this rule will only be used for any vendors test: /\.css$/, loaders: ['style-loader', 'css-loader'], include: [/node_modules/] }, { test: /\.css$/, loaders: ['to-string-loader', 'css-loader'], exclude: [/node_modules/] //add this line so we ignore css coming from node_modules },The firs rule will be only applied when you try to import css, from any package inside node_modules the second rule will be applied to any css that you import from outside the node_modules
So here is a way to import various CSS files using the angular-cli which I find the most convenient.
Basically, you can refer to the CSS files (order is important if you will be overriding them) in the config and angular-cli will take care of the rest. For instance, you might want to include a couple of styles from node-modules, which can be done as follows:
"styles": [ "../node_modules/font-awesome/css/font-awesome.min.css", "../node_modules/primeng/resources/primeng.min.css", "styles.css" ]A sample full-config might look like this:
.angular-cli.json
{ "$schema": "./node_modules/@angular/cli/lib/config/schema.json", "project": { "name": "my-angular-app" }, "apps": [ { "root": "src", "outDir": "dist", "assets": [ "assets", "favicon.ico" ], "index": "index.html", "main": "main.ts", "polyfills": "polyfills.ts", "test": "test.ts", "tsconfig": "tsconfig.app.json", "testTsconfig": "tsconfig.spec.json", "prefix": "app", "styles": [ "../node_modules/font-awesome/css/font-awesome.min.css", "../node_modules/primeng/resources/primeng.min.css", "styles.css" ], "scripts": [], "environmentSource": "environments/environment.ts", "environments": { "dev": "environments/environment.ts", "prod": "environments/environment.prod.ts" } } ], "e2e": { "protractor": { "config": "./protractor.conf.js" } }, "lint": [ { "project": "src/tsconfig.app.json", "exclude": "**/node_modules/**" }, { "project": "src/tsconfig.spec.json", "exclude": "**/node_modules/**" }, { "project": "e2e/tsconfig.e2e.json", "exclude": "**/node_modules/**" } ], "test": { "karma": { "config": "./karma.conf.js" } }, "defaults": { "styleExt": "scss", "component": {} }}