ESLint: “error Parsing error: The keyword ‘const’ is reserved”

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ESLint defaults to ES5 syntax-checking.
You’ll want to override to the latest well-supported version of JavaScript.

Try adding a .eslintrc.json file to your project. Inside it:

{
    "parserOptions": {
        "ecmaVersion": "latest"
    },

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

Hopefully this helps.

EDIT: I also found this example .eslintrc.json which might help.

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