js: add options to be passed to uglify

lib/index.js

@@ -8,26 +8,30 @@ var uglify = require('uglify-js');
  * Minify a `string` of an unknown language.
  *
  * @param {String} string
+ * @param {Object} opts
  * @return {String}
  */
 
-module.exports = exports = function minify (string) {
+module.exports = exports = function minify (string, opts) {
   var lang = detect(string);
   var fn = exports[lang];
   if (!fn) throw new Error('Unsupported language: ' + lang);
-  return fn(string);
+  return fn(string, opts);
 };
 
 /**
- * Minify a Javascript `string`.
+ * Minify a Javascript `string` with optional `opts`.
  *
  * @param {String} string
+ * @param {Object} opts
  * @return {String}
  */
 
 exports.js =
-exports.javascript = function (string) {
-  return uglify.minify(string, { fromString: true }).code;
+exports.javascript = function (string, opts) {
+  opts = opts || {};
+  opts.fromString = true;
+  return uglify.minify(string, opts).code;
 };
 
 /**
@@ -50,4 +54,4 @@ exports.css = function (string) {
 
 exports.html = function (string) {
   return html.minify(string);
-};
+};

test/index.js

@@ -32,6 +32,13 @@ describe('minify', function () {
       assert.equal(min, minify(max));
     });
   });
+
+  it('should pass options to uglify js', function(){
+    var js = '(function(){ var analytics = window.analytics = []; analytics.push(1) })();';
+    var opts = { mangle: { except: ['analytics'] }};
+    assert(!~minify(js).indexOf('var analytics'), 'expected "analytics" to be mangled');
+    assert(~minify(js, opts).indexOf('var analytics'), 'expected "analytics" to not be mangled');
+  });
 });
 
 /**
@@ -64,4 +71,4 @@ describe('cli', function () {
 function fixture (name) {
   var filename = path.resolve(__dirname, 'fixtures', name);
   return fs.readFileSync(filename, 'utf8');
-}
+}