loader-runner

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, SourceMap?, Meta?]
		// The result as an array matching the arguments passed by the final normal loader
		// (typically [content, sourceMap, meta])
		// 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
	}
);

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Similar packages

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webpack

While webpack is a comprehensive module bundler, it internally uses a mechanism similar to loader-runner to process files with loaders. Compared to loader-runner, webpack offers a broader set of features for bundling, optimization, and asset management but is more complex and requires more configuration.

cosmiconfig

Cosmiconfig is designed for loading and parsing configuration files from various formats. It's similar to loader-runner in the sense that both deal with processing files, but cosmiconfig focuses on configuration files and does not directly relate to webpack loaders or the concept of transforming file content.