Semigradskyxo-loader 
XO loader for webpack. Based on eslint-loader
Install
$ npm install xo-loaderUsage
In your webpack configuration
module.exports = {
// ...
module: {
loaders: [
{test: /\.js$/, loader: 'xo-loader', exclude: /node_modules/}
]
}
// ...
}When using with transpiling loaders (like babel-loader), make sure they are in correct order
(bottom to top). Otherwise files will be check after being processed by babel-loader
module.exports = {
// ...
module: {
loaders: [
{test: /\.js$/, loader: 'babel-loader', exclude: /node_modules/},
{test: /\.js$/, loader: 'xo-loader', exclude: /node_modules/}
]
}
// ...
}To be safe, you can use preLoaders section to check source files, not modified
by other loaders (like babel-loader)
module.exports = {
// ...
module: {
preLoaders: [
{test: /\.js$/, loader: 'xo-loader', exclude: /node_modules/}
]
}
// ...
}webpack@2.1.0-beta.23 and up
As of latest release notes, preLoaders and postLoaders have been deprecated in favor of enforce: 'pre' or enforce: 'post'. Also custom properties are not allowed, and can be supplied through webpack.LoaderOptionsPlugin({}).
module.exports = {
// ...
module: {
loaders [
{test: /\.js$/, enforce:'pre', loader: 'xo-loader', exclude: /node_modules/}
]
},
plugins: [
new webpack.LoaderOptionsPlugin({
options: {
xo: {
emitError: true
}
}
})
]
// ...
}Options
You can pass XO options directly by
- Adding a query string to the loader for this loader usabe only
{
module: {
preLoaders: [
{
test: /\.js$/,
loader: 'xo-loader?{rules:[{semi:0}]}',
exclude: /node_modules/,
},
],
},
}- Adding an
xoentry in your webpack config for global options:
module.exports = {
xo: {
space: true
}
}Note that you can use both method in order to benefit from global & specific options
Errors and Warning
By default the loader will auto adjust error reporting depending
on xo errors/warnings counts.
You can still force this behavior by using emitError or emitWarning options:
emitError (default: false)
Loader will always return errors if this option is set to true.
module.exports = {
entry: "...",
module: {
// ...
}
xo: {
emitError: true
}
}emitWarning (default: false)
Loader will always return warnings if option is set to true.
failOnWarning (default: false)
Loader will cause the module build to fail if there are any xo warnings.
module.exports = {
entry: "...",
module: {
// ...
}
xo: {
failOnWarning: true
}
}failOnError (default: false)
Loader will cause the module build to fail if there are any xo errors.
module.exports = {
entry: "...",
module: {
// ...
}
xo: {
failOnError: true
}
}