custom-loader

This package can help you use your own custom loader in webpack.

Usage

var customLoader = require("custom-loader");
 
customLoader.loaders.myLoader = function() {
    // loader content
};
 
// or
 
customLoader.loaders = {
    loaderA: function() {},
    loaderB: function() {}
};

Then in webpack config:

module: {
  loaders: [
    {test: /\.ext$/, loader: 'custom-loader?name=myLoader&otherQuery=value'}
  ]
}

If the default name key duplicated with other query parameter, you can change it:

var customLoader = require("custom-loader");
customLoader.queryKey = "loader";
 
// then you can specify loader like this:
// custom-loader?loader=myLoader&otherQuery=value

Without this package

Actually, you can put your loader function in a separate file, and directly reference it:

In my-loader.js

module.exports = function myLoader() {
 
};

In webpack.config.js

var path = require("path");

module.exports = {
    // ...
    module: {
        loader: [
            {test: /\.ext$/, loader: path.join(__dirname, "my-loader.js")}
        ]
    }
    // ...
};

// or

module.exports = {
    // ...
    module: {
        loader: [
            {test: /\.ext$/, loader: "my-loader"}
        ]
    },
    resolveLoader: {
        alias: {
            "my-loader": path.join(__dirname, "my-loader.js")
        }
    },
    // ...
};

Notice: there's a bug with resolveLoader.alias, see #1289

But this require you create a separate file for every loader, and was not so flexible. So I create this package.