Does not work with uglify-es?

[davistan]

Hi, I've just tried to process a ES6 file using uglify-es.

The same file running on uglifyjs CLI works but using the minifier will produce error.

Using pump, produces error below:
Caused by: TypeError: Cannot read property 'replace' of undefined

Hope this can be fixed easily.

Thanks in advance.

[davistan]

Just saw this - perhaps this is caused by this: mishoo/UglifyJS#1907

[terinjokes]

@davistan Probably. You'll be able to use it after we release a beta supporting v3 of UglifyJS.

[davistan]

Noted. Thanks!

[terinjokes]

@davistan Be aware I'm likely to include a breaking change of this feature in the next major release, see #291.

[KennethanCeyer]

I hope you include these fixes ASAP.

Thank you.

[KennethanCeyer]

I faced same problem and solved this problem.

I can solve this problem to downgrade uglify-js to v2.8.10.

# Delete uglify-js@3.0.x
$ npm uninstall uglify-js --save-dev

# Re-install that plugin v2.8.10 version
$ npm install uglify-js@2.8.10 --save-dev

[terinjokes]

@KennethanCeyer if you're not using a specific version of UglifyJS, you don't have to install it: by default you'll get the latest version of UglifyJS2 and you can use the normal import.

[KennethanCeyer]

@terinjokes

I understand and now checked gulp-uglify has dependency uglify-js@2.8.10

I had mistake, i installed uglify-js directly.

I hope this comment will be helped who have faced same error.

[daviddias]

@KennethanCeyer for me that wasn't the full solution as it would disable me from using ES6 features.

I had to install uglify-js on this specific commit: "uglify-js": "github:mishoo/UglifyJS2#7906033e82d66f2735f8626e98f0f7352d9b3d25", - ref https://github.com/dignifiedquire/aegir/pull/130/files

Hope this helps for ES6 users out there :)

[terinjokes]

@diasdavid If you install from my "three" branch, you can use uglify-es, but as I noted in a comment above, the API will likely change tonight (before I do a release of gulp-uglify@3)

[daviddias]

thanks @terinjokes. I'll keep posted :)

[gluttonman]

@terinjokes Today, i use uglify-js@3.0 that has a feature {ie8:true}.But, gulp-uglify unsupport this property.because gulp-uglify property {fromString:true} that uglify-js@3.0 unsupport!

[terinjokes]

@gluttonman you can install an alpha version of gulp-uglify@3 from the "three" git branch.

[gluttonman]

@terinjokes thank you!