loader-runner

import { runLoaders } from "loader-runner";

runLoaders(
	{
		resource: "/abs/path/to/file.txt?query",
		// String: Absolute path to the resource (optionally including query string)

		loaders: ["/abs/path/to/loader.js?query"],
		// String[]: Absolute paths to the loaders (optionally including query string)
		// {loader, options}[]: Absolute paths to the loaders with options object

		context: { minimize: true },
		// Additional loader context which is used as base context

		processResource: (loaderContext, resourcePath, callback) => {
			// ...
		},
		// Optional: A function to process the resource
		// Must have signature function(context, path, function(err, buffer))
		// By default readResource is used and the resource is added a fileDependency

		readResource: fs.readFile.bind(fs),
		// Optional: A function to read the resource
		// Only used when 'processResource' is not provided
		// Must have signature function(path, function(err, buffer))
		// By default fs.readFile is used
	},
	(err, result) => {
		// err: Error?
		// result.result: Buffer | String
		// The result
		// only available when no error occurred
		// result.resourceBuffer: Buffer
		// The raw resource as Buffer (useful for SourceMaps)
		// only available when no error occurred
		// result.cacheable: Bool
		// Is the result cacheable or do it require reexecution?
		// result.fileDependencies: String[]
		// An array of paths (existing files) on which the result depends on
		// result.missingDependencies: String[]
		// An array of paths (not existing files) on which the result depends on
		// result.contextDependencies: String[]
		// An array of paths (directories) on which the result depends on
	}
);

More documentation following...