When you're using the create-react-app package you're able to have .scss-files compiled into .css-files as you type in them. You can then do import './Header.css'; in your React component files and the styles are applied. It's easy to use your dev-tools and see where the styles are coming from.
Next.js tried to get everyone to use Styled-JSX to have your stylesheets inline inside your JSX files, similar to how web components (or Polymer) do it. I personally strongly dislike that approach.
Other problems:
Styled-JSX isn't supported in my IDE (Webstorm) (even the work-around looks awful);
Styled-JSX isn't supported in my dev-tools (Chrome) - there is no reference to what line the style is defined at;
It makes my source code look like a garbled mess;
How do I include 3rd party CSS solutions with Styled-JSX? Am I now supposed to add a <link> to my <head>? For everything external? How is that optimal usage of bandwidth? Referencing to files inside of node_modules feels awkward and bad, too.
So, just add rules to next.config.js, right?
module.exports = {
webpack: (config, { dev }) => {
config.module.rules.push(
{
test: /\.(css|scss)/,
loader: "style-loader!css-loader"
}
);
return config
}
};
And then just import './Page.scss'; (Don't worry, it's valid CSS, not even SASS yet, I know I did not include the sass-loader here just yet. I try to keep it simple first.)
Refresh the page (Server Side Rendered): does NOT work;
Save the file (dynamically loaded after saving the file): it does work (until you reload the page);
Keeps complaining the file can't be found, plenty of Google hits there, too. No real solutions that work today.
So, why doesn't it work with SSR?
Note that v5 of next.js will support CSS/Sass/Less almost out of the box:
For importing .css .scss or .less we’ve created modules which have sane defaults for server side rendering.
Until then, the following set of rules worked for me (assuming the .sass files are in /styles dir):
config.module.rules.push(
{
test: /\.(css|sass)/,
loader: 'emit-file-loader',
options: {
// this path is relative to the .next directory
name: 'dist/[path][name].[ext]'
}
},
{
test: /\.css$/,
use: ['babel-loader', 'raw-loader', 'postcss-loader']
},
{
test: /\.sass$/,
use: ['babel-loader', 'raw-loader', 'postcss-loader',
{ loader: 'sass-loader',
options: {
includePaths: ['styles', 'node_modules']
.map((d) => path.join(__dirname, d))
.map((g) => glob.sync(g))
.reduce((a, c) => a.concat(c), [])
}
}
]
}
)
Related
I created a react setup for a little project and decided to add tailwind. It was successful but when I add the class to the components, I don't see any change.
This is the link to the repository
Everything seems fine. Once delete the node modules and package.lock.json file and install node modules then start the server.
Also, there is no need to import tailwind.css in App.js.
Just main.css is enough as we are already appending all the styles to main.css (check scripts in package.json)
I found the problem. It was from my webpack config for CSS loader. I noticed when I added my own stylesheet, not all the rules were applied.
{
loader: "css-loader",
options: {
modules: true,
importLoaders: 1,
sourceMap: true
}
}
I had to remove all the options. I don't even know why I added it at first. Tailwind CSS now works.
If you know that you've configured Tailwind and added the right settings and presets, maybe you need to add this:
module.exports = {
content: [
'./public/index.html', <-
],
}
or this, if you're using ReactJS:
module.exports = {
content: [
'./pages/**/*.{html,js}',
'./components/**/*.{html,js}'
],
// ...
}
Within your tailwind.config.js file.
You also can learn/read more about it on: https://tailwindcss.com/docs/content-configuration, that worked perfectly for me!
I am trying to generate a static website out of my (minimal) code with Nuxt. In that code, I integrate in particular the tailwindcss toolkit as well as vue2-leaflet. Upon
nuxt generate
I get two css files, one for the tailwindcss css and the other for the leaflet css. While the former file is fine and contains everything I need, the latter is pretty sparse:
.leaflet-tile-pane{z-index:200}#-webkit-keyframes leaflet-gestures-fadein{to{opacity:1}}#keyframes leaflet-gestures-fadein{0%{opacity:0}to{opacity:1}}
Of course, that makes my map render in a pretty strange way, because most of the css is missing. Here's my current nuxt.config.js:
module.exports = {
mode: 'universal',
head: {
title: pkg.name,
meta: [
{ charset: 'utf-8' },
{ name: 'viewport', content: 'width=device-width, initial-scale=1' },
{ hid: 'description', name: 'description', content: pkg.description }
],
link: [
{ rel: 'icon', type: 'image/x-icon', href: '/favicon.ico' }
]
},
css: [
],
plugins: [
{ src: '~plugins/leaflet.js', mode: 'client' }
],
buildModules: [
'#nuxtjs/tailwindcss'
],
modules: ['#nuxtjs/apollo', 'nuxt-purgecss', ['nuxt-i18n', i18n]],
[...]
build: {
extractCSS: true,
}
}
Getting rid of the extractCSS ends up incorporating all the relevant css into the index.html. It works, but then I get the following error:
ERROR Webpack mode only works with build.extractCSS set to *true*. Either extract your CSS or use 'postcss' mode
I'm not sure I understand how that whole css extraction works. Could someone enlighten me? Why is it not working with extractCSS: true? How can I make it work? Why is it working in SPA mode but not in static mode?
You are using nuxt-purgecss which is using purgecss to strip unused CSS.
purgecss do scan HTML (or vue) files for CSS classes in use and then strip unused classes from final CSS bundle.
You can take a look at default purgecss configuration used by nuxt-purgecss here. The paths lists the paths purgecss will scan for CSS usage.
Because you are not using most of the leaflet css directly (in your components), its is necessary to configure purgecss to don't remove leaflet's css.
You can do that by whitelisting (btw not sure if "comment" method will work in Vue\Nuxt)
You can read more here and here
Not tested!!
// nuxt.config.js
{
purgeCSS: {
whitelistPatterns: [/leaflet/, /marker/]
}
}
Regarding the error message
Error message is from nuxt-purgecss module - it is clearly documented here
I don't have deep knowledge of Nuxt build process. So I just assume from the docs that extractCSS: true will use extract-css-chunks-webpack-plugin to extract all CSS to separate CSS file, while (default) extractCSS: false will use PostCSS to extract all CSS and put it directly into the <style> tag of rendered page.
All of that doesn't matter IMHO because the root problem is the use of purgecss and the solution is to configure it correctly to whitelist leaflet CSS classes....
I'm trying to apply CSS modules concept agains my angular app, to order embed it into existing frontend with CSS which unfortunately overlaps. My project uses scss, I want webpack "modulize" my CSS after CSS if formed from scss on last build step I think.
I want to use CSS loader of webpack to achieve this.
But I couldn't make it work.
https://www.npmjs.com/package/#angular-builders/custom-webpack
to order customize my webpack config.
I've tried to apply the next configuration
module.exports = {
module: {
rules: [
{
test: /\.css$/i,
loader: 'css-loader',
options: {
modules: true,
},
},
],
},
};
and got this error
ERROR in Module build failed (from ./node_modules/postcss-loader/src/index.js):
SyntaxError
(1:1) Unknown word
> 1 | exports = module.exports = require("../../../../css-loader/dist/runtime/api.js")(false);
I've tried to find and add css loader into existing
module.exports = (config, options) => {
const rules = config.module.rules || [];
rules.forEach(rule => {
if (String(rule.test) === String(/\.css$/)) {
rule.use.push({ loader: 'css-loader', options: { modules: true }})
}
});
return config;
};
Getting the same error. How to make it work?
Update 1:
I found that angular uses postcss which also provides this functionality as a plugin, postcss-modules. Also still can't make it work.
I was able to implement CSS Modules in Angular with the help of #angular-builders/custom-webpack as you suggested.
However, my solution use postcss-modules and posthtml-css-modules instead of the css-loader to hash the styles.
postcss-modules hash all the styles, then posthtml-css-modules replaces the class names on the html files by the hashed class names.
I documented my solution here:
Live Demo: https://angular-css-modules.herokuapp.com/
Github Repo: https://github.com/gquinteros93/angular-css-modules
Article with the step by step: https://indepth.dev/angular-css-modules/
I hope it will be useful for you.
We are developing a cloud application in angular 5 that will be deployed in a single instance but will be addressed to several customer.
The question concerns the management of themes, each customer wants to have his own theme (mainly colors).
The architecture (simplified) of the application looks like this:
--src
--app
app.component.html
app.component.scss
app.component.ts
-- component1
comp1.component.html
comp1.component.scss
comp1.component.ts
...
--scss
-- current
style.scss
_variables.scsc
-- customer1
style.scss
_variables.scss
-- customer2
style.scss
_variables.scss
...
Currently we are deploying by client, so there is no problem, we copy / paste the style in the current before the build.
Each component.scss imports _variables.scss to exploit the variables.
We would like that when a user logs on to the app, we detect the customer and choose the right style, but that the css is generated at compile time.
Is there a way to define global variables that can be modified in runtime and that impacts sub-components?
The solutions I tested:
Set in angular-cli a scss per customer, build and execute script js to modify the html link to css "href = 'assets / {customer} .bundle.css'". It works for global styles, but variables in subcomponents are not updated.
Use pure css to declare scope variables: root {--color-primary: gray; } and exploit them in the sub-components .test {color: var (- color-primary)}.
Make a JS script that will update all the global variables according to the client.
It works, but no equivalent in SCSS? strange
I do not know if I gave enough detail, thanks for the help.
As there is no proper way to do this; And solution used by Angular theming was not satisfactory to us; we've decided to use custom webpack builder that will compile our style based on the entries we provide. Please note, that we are not using SCSS in angular components explicitly.
"use strict";
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const AutoPrefixer = require("autoprefixer");
module.exports = {
entry: {
"modern_style.application": "./src/styles/modern_style.scss",
"default.application": "./src/styles/default.scss"
},
plugins: [
new MiniCssExtractPlugin({
filename: "[name].bundle.css"
})
],
module: {
rules: [
{
test: /\.scss$/,
use: [
MiniCssExtractPlugin.loader,
"css-loader",
{
loader: "postcss-loader",
options: {
ident: "postcss",
plugins: [AutoPrefixer()],
sourceMap: true
}
},
{
loader: "resolve-url-loader"
},
{
loader: "sass-loader",
options: {
precision: 8,
includePaths: [],
sourceMap: true
}
}
]
}
]
}
};
These entry files will have their variables set & customizations applied in each respective entry file, which looks like this:
// Entry file: modern_style.scss
$someVariableToBeUsedOrOverwritten: red;
#import "common/allModulesAreImportedHere"
.customRule{
//...
}
This generated style, e.g default.bundle.css is then loaded via <link rel="stylesheet" type="text/css" [href]="linkToTheme">
There is no way to pass any variables from ts to scss.
All you need is theming.
So for each customer you need a global body class whith its own set of variables / classes.
Check out angular material theming docs for example https://material.angular.io/guide/theming#defining-a-custom-theme
Mixins will solve your issue.
In the specific customer scss files, you would be holding the specific definition.
In the component.scss, you would be using the mixin, which is specific to the customer and it will resolve your issue on both compile and run time.
I'm using Webpack with the extract-text-webpack-plugin.
In my project, I have some build scripts. One of the build scripts is supposed to bundle and minify CSS only. As I'm using Webpack for the other scripts, I found it a good idea to use Webpack even when I only want to bundle and minify CSS.
It's working fine, except that I can't get rid of the output.js file. I don't want the resulting webpack output file. I just want the CSS for this particular script.
Is there a way to get rid of the resulting JS? If not, do you suggest any other tool specific for handling CSS? Thanks.
There is an easy way, no extra tool is required.
There is an easy way and you don't need extra libraries except which you are already using: webpack with the extract-text-webpack-plugin.
In short:
Make the output js and css file have identical name, then the css file will override js file.
A real example (webpack 2.x):
import path from 'path'
import ExtractTextPlugin from 'extract-text-webpack-plugin'
const config = {
target: 'web',
entry: {
'one': './src/one.css',
'two': './src/two.css'
},
output: {
path: path.join(__dirname, './dist/'),
filename: '[name].css' // output js file name is identical to css file name
},
module: {
rules: [
{
test: /\.css$/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: 'css-loader'
})
}
]
},
plugins: [
new ExtractTextPlugin('[name].css') // css file will override generated js file
]
}
Unfortunately, that is currently not possible by design. webpack started as a JavaScript bundler which is capable of handling other "web modules", such as CSS and HTML. JavaScript is chosen as base language, because it can host all the other languages simply as strings. The extract-text-webpack-plugin is just extracting these strings as standalone file (thus the name).
You're probably better off with PostCSS which provides various plugins to post-process CSS effectively.
One solution is to execute webpack with the Node API and control the output with the memory-fs option. Just tell it to ignore the resulting js-file. Set the output.path to "/" in webpackConfig.
var compiler = webpack(webpackConfig);
var mfs = new MemoryFS();
compiler.outputFileSystem = mfs;
compiler.run(function(err, stats) {
if(stats.hasErrors()) { throw(stats.toString()); }
mfs.readdirSync("/").forEach(function (f) {
if(f === ("app.js")) { return; } // ignore js-file
fs.writeFileSync(destination + f, mfs.readFileSync("/" + f));
})
});
You can clean up your dist folder for any unwanted assets after the done is triggered. This can be easily achieved with the event-hooks-webpack-plugin
//
plugins: [
new EventHooksPlugin({
'done': () => {
// delete unwanted assets
}
})
]
Good Luck...