#NPM BUILD WEBPACK WITHOUT EXTERNALS INSTALL#

If all went well, you should now see your icon as a repeating background, as well as an img element beside our Hello webpack text.

Webpack 5.4.0 compiled successfully in 1972 ms node_modules/css-loader/dist/cjs.js !./src/style.css 648 bytes src/icon.png 42 bytes (javascript ) 9.88 KiB (asset ) src/ 1.45 KiB (javascript ) 9.88 KiB (asset ) node_modules/css-loader/dist/runtime/getUrl.js 830 bytes node_modules/css-loader/dist/runtime/*.js 2.38 KiB Let's create a new build and open up the index.html file again: $ npm run buildДЄssets by status 9.88 KiB 1 assetДЄsset bundle.js 73.4 KiB (name: main ) 1 related assetД¬acheable modules 540 KiB (javascript ) 9.88 KiB (asset ) Let's add an image to our project and see how this works, you can use any image you like: The html-loader handles in the same manner. The loader will recognize this is a local file, and replace the './my-image.png' path with the final path to the image in your output directory. When using the css-loader, as shown above, a similar process will occur for url('./my-image.png') within your CSS. Now, when you import MyImage from './my-image.png', that image will be processed and added to your output directory and the MyImage variable will contain the final url of that image after processing. So now we're pulling in our CSS, but what about our images like backgrounds and icons? As of webpack 5, using the built-in Asset Modules we can easily incorporate those in our system as well: On top of that, loaders exist for pretty much any flavor of CSS you can think of вЂ“ postcss, sass, and less to name a few. Note that you can, and in most cases should, minimize css for better load times in production. It should contain the style block that we imported in index.js. To see what webpack did, inspect the page (don't view the page source, as it won't show you the result, because the tag is dynamically created by JavaScript) and look at the page's head tags. Open up dist/index.html in your browser again and you should see that Hello webpack is now styled in red. Webpack 5.4.0 compiled successfully in 2231 ms node_modules/css-loader/dist/cjs.js !./src/style.css 326 bytes node_modules/css-loader/dist/runtime/api.js 1.57 KiB node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js 6.67 KiB Now run your build command: $ npm run buildДЄsset bundle.js 72.6 KiB (name: main ) 1 related asset Let's try it out by adding a new style.css file to our project and import it in our index.js:Д¬onst element = document.createElement('div') Д®lement.innerHTML = _.join(, ' ') Now, when that module is run, a tag with the stringified css will be inserted into the of your html file. This enables you to import './style.css' into the file that depends on that styling. css will be served to the style-loader and the css-loader. Webpack uses a regular expression to determine which files it should look for and serve to a specific loader. If this convention is not followed, webpack is likely to throw errors. The above order of loaders should be maintained: 'style-loader' comes first and followed by 'css-loader'. Finally, webpack expects JavaScript to be returned by the last loader in the chain. The first loader passes its result (resource with applied transformations) to the next one, and so forth. Each loader in the chain applies transformations to the processed resource.

#NPM BUILD WEBPACK WITHOUT EXTERNALS INSTALL#

In order to import a CSS file from within a JavaScript module, you need to install and add the style-loader and css-loader to your module configuration: npm install -save-dev style-loader css-loader

Let's make a minor change to our project before we get started: Let's start with CSS, as you may already be familiar with that setup. explicit dependencies) can be applied to everything used in building a website or web app. This means that the same benefits listed above for JavaScript (e.g. One of the coolest webpack features is that you can also include any other type of file, besides JavaScript, for which there is a loader or built-in Asset Modules support. This is great because every module now explicitly states its dependencies and we'll avoid bundling modules that aren't in use. The same idea was used for JavaScript modules, but tools like webpack will dynamically bundle all dependencies (creating what's known as a dependency graph).

Prior to webpack, front-end developers would use tools like grunt and gulp to process these assets and move them from their /src folder into their /dist or /build directory. Now let's try to incorporate some other assets, like images, to see how they can be handled. If you've been following the guides from the start, you will now have a small project that shows 'Hello webpack'.

Npm build webpack without externals