Is there any BundleTransformer JS minifiers that supports ES6?

Question

Is there any JS minifiers for BundleTransformer that supports EcmaScript 6? I tried to install:

• BundleTransformer.Closure
• BundleTransformer.YUI
• BundleTransformer.UglifyJs

But not one of them handles the syntax of an ES6 string template, for example:

`Hello ${world}`

Am I missing something, or is it time to upgrade to Node + X?

Answer 1

Tormod!

Suppose you have the following code:

var world = 123;
alert(`Hello ${world}`);

Only two minifiers from the Bundle Transformer can handle it:

• MicrosoftAjaxJsMinifier BundleTransformer.MicrosoftAjax. ES6.

• ClosureLocalJsMinifier BundleTransformer.Closure :

  <?xml version="1.0" encoding="utf-8"?>
  <configuration>
    …
    <bundleTransformer xmlns="http://tempuri.org/BundleTransformer.Configuration.xsd">
      …
      <closure>
        <js>
          …
          <local closureCompilerApplicationPath="…"
            javaVirtualMachinePath="…"
            languageInput="EcmaScript6" languageOutput="EcmaScript3" />
          …
        </js>
      </closure>
      …
    </bundleTransformer>
    …
  </configuration>
  

ES6 ES3, ES3 . , languageOutput : EcmaScript5 EcmaScript5Strict.