Get list of excluded module in webpak config

webpack.external.js

module.exports = function(){
    var fs = require("fs");
    var nodeExternal = {};
    var pkg = JSON.parse(fs.readFileSync('package.json', { encoding: 'utf-8' }));
    Object.keys(pkg.dependencies).forEach(function (name) {
        nodeExternal[name] = "require('" + name + "')";
    });
    Object.keys(pkg.devDependencies).filter(function (v) { return !v.match(/@types/); }).forEach(function (name) {
        nodeExternal[name] = "require('" + name + "')";
    });
    console.log('externals', nodeExternal);
    return nodeExternal;
}