index.js

var through = require('through2'),
	gutil = require('gulp-util'),
	JavaScriptObfuscator = require('javascript-obfuscator'),
	PluginError = gutil.PluginError;

module.exports = function gulpJavaScriptObfuscator(options) {
	if(!options) {
		options = {}
	}

	return through.obj(function (file, enc, cb) {
		var obfuscationResult;
		if (file.isNull()) {
			return cb(null, file);
		}

		if (file.isBuffer()) {
			try {
				obfuscationResult = JavaScriptObfuscator.obfuscate(String(file.contents), Object.assign(options, {identifiersPrefix: file.path.replace(/.*\/+|\W/g, '')}));
				file.contents = new Buffer(obfuscationResult.getObfuscatedCode());
				if(options.sourceMap && options.sourceMapMode !== 'inline') {
					this.push(new gutil.File({
						cwd: file.cwd,
						base: file.base,
						path: file.path + '.map',
						contents: new Buffer(obfuscationResult.getSourceMap())
					}))
				}
				cb(null, file);
			}
			catch (err) {
				throw new PluginError('gulp-javascript-obfuscator', err);
			}
		} else if (file.isStream()) {
			throw new PluginError('gulp-javascript-obfuscator', 'Streams are not supported!');
		}
	});
};