refactor: check all falsy conditions of plugins and opts before returning NoWorkResult instance in process()

Author: ahmdammarr

lib/processor.js

@@ -43,10 +43,10 @@ class Processor {
 
   process(css, opts = {}) {
     if (
-      this.plugins.length === 0 &&
-      typeof opts.parser === 'undefined' &&
-      typeof opts.stringifier === 'undefined' &&
-      typeof opts.syntax === 'undefined'
+      !this.plugins.length &&
+      !opts.parser &&
+      !opts.stringifier &&
+      !opts.syntax
     ) {
       return new NoWorkResult(this, css, opts)
     } else {