less.js/lib/less-browser/plugin-loader.js

// TODO: Add tests for browser @plugin
/* global window */

var AbstractPluginLoader = require('../less/environment/abstract-plugin-loader.js');

/**
 * Browser Plugin Loader
 */
var PluginLoader = function(less) {
    this.less = less;
    // shim for browser require?
    this.require = require;
};

PluginLoader.prototype = new AbstractPluginLoader();

PluginLoader.prototype.loadPlugin = function(filename, basePath, context, environment, fileManager) {
    return new Promise(function(fulfill, reject) {
        fileManager.loadFile(filename, basePath, context, environment)
            .then(fulfill).catch(reject);
    });
};

module.exports = PluginLoader;