Eslint not recognizing Reflect

Question

I'm using Reflect in my code. Problem is Eslint thinks its an undeclared variable. I'm getting this error:

eslint --config ./.eslintrc.json src

30:25  error  'Reflect' is not defined  no-undef
32:9   error  'Reflect' is not defined  no-undef
39:21  error  'Reflect' is not defined  no-undef
40:5   error  'Reflect' is not defined  no-undef

I have my .eslintrc file set to ECMAScript 2015:

"parserOptions": {
    "ecmaVersion": 2015,
    "sourceType": "module",
    "ecmaFeatures": {
      "globalReturn": true
    }
  }

Not sure why it's applying the no-undef rule to Reflect. All my code is typically ECMAScript 2015, nothing unusual.

Answer 1

In addition to setting the ecmaVersion, you need to tell it to include "es6" globals:

{
    "env": {
        "es6": true
    }
}

(You'll probably want others in there too, such as browser.)

More in Specifying Environments in the docs.