EcmaScript 6 - Tern IDE for Eclipse Validation Errors

Question

I am using Eclipse Mars with Tern IDE für ES6 support on version 1.1.0 (snapshot). I get errors checking the arrow functions and const-export, as you can see in this screenshot:

I worked on these descriptions, but the errors did not disappear: https://github.com/angelozerr/tern.java/wiki/Tern-&-ECMAScript6-support https://github.com/angelozerr/tern.java/wiki/ Tern-linter

I do not know, however, what is really supported by the Tern plugin, but according to the documentation at http://ternjs.net/ Tern should support arrow functions with 0.14. However, only the class, import, and promise support are mentioned on the github IDE page (which does not lend itself to a plugin for ES6 support).

Is there anyone who is developing ES6 with Eclipse with (more or less) full feature support? I kinda feel like a unicorn ...

Answer 1

Your error comes from the JSDT Validator, which does not support ES6 syntax (and not from tern).

tern 1.1.0-SNAPSHOT provides ES6 support for termination, hyperlink, validation, but not for ES6 validation. Linter https://github.com/angelozerr/tern.java/wiki/Tern-Linter is a type checking tool, not a syntax checking tool.

To test ES6 with the Eclipse IDE and tern.java, you should:

• disable JSDT Validator. To do this, you can remove the JSDT character from yours. The project. Or install (never tested) an unreleased Eclipse JEE distribution that provides the ability to disable internal parsing and validation. See http://tools.jboss.org/documentation/whatsnew/jbosstools/4.3.0.Final.html#javascript-development-tools-improvements

• after that you can use JSHint to test ES6, https://github.com/angelozerr/tern.java/wiki/Tern-Linter-JSHint . To enable JSHint to validate ES6 correctly, it needs to activate the "esnext" -option, otherwise the ES6 syntax will be marked as errors. This option is located in the properties of the \ Tern \ Validation \ JSHint project in the "Vacation Options" section.