Using LESS CSS with the latest Create React App - css

Question

It seems like everything i'm finding online is old and doesn't seem to work for me.. Any help is appreciated.
I ran "npm run eject". Then I installed with NPM
"devDependencies": {
"less": "^3.12.2",
"less-loader": "^6.2.0"
},
and in my "webpack.config.js" file this is how i have it so far:
module: {
strictExportPresence: true,
rules: [
{
test: /\.less$/,
loader: 'less-loader', // compiles Less to CSS
},
// Disable require.ensure as it's not a standard language feature.
{ parser: { requireEnsure: false } },
// First, run the linter.
// It's important to do this before Babel processes the JS.
{
test: /\.(js|mjs|jsx|ts|tsx)$/,
enforce: 'pre',
use: [
{
options: {
cache: true,
formatter: require.resolve('react-dev-utils/eslintFormatter'),
eslintPath: require.resolve('eslint'),
resolvePluginsRelativeTo: __dirname,
},
loader: require.resolve('eslint-loader'),
},
],
include: paths.appSrc,
},
and then i get this error message when trying to run:
Failed to compile ./src/styles/index.less
(./node_modules/css-loader/dist/cjs.js!./node_modules/less-loader/dist/cjs.js!./node_modules/file-loader/dist/cjs.js??ref--7-oneOf-7!./src/styles/index.less)
module.exports = webpack_public_path +
"static/media/index.1f54121a.less";
^ Unrecognised input
Error in G:\Work Projects\uno\src\styles\index.less (line 1, column 15)

Answer 1

Hopefully this helps someonme. I found the answer here: https://segmentfault.com/a/1190000018858055
Short Version:
const cssRegex = /\.(css|less)$/;
const cssModuleRegex = /\.module\.(css|less)$/;
...
...
...
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production, we use MiniCSSExtractPlugin to extract that CSS
// to a file, but in development "style" loader enables hot editing
// of CSS.
// By default we support CSS Modules with the extension .module.css
{
test: cssRegex, // edited to add less above
exclude: cssModuleRegex, // edited to add less above
use: getStyleLoaders({
importLoaders: 2, // changed from 1 to 2
modules: true, // added this line
sourceMap: isEnvProduction && shouldUseSourceMap,
},
'less-loader'),
// Don't consider CSS imports dead code even if the
// containing package claims to have no side effects.
// Remove this when webpack adds a warning or an error for this.
// See https://github.com/webpack/webpack/issues/6571
sideEffects: true,
},
// Adds support for CSS Modules (https://github.com/css-modules/css-modules)
// using the extension .module.css
{
test: cssModuleRegex,
// etc