How to add ES6?

How to add ES6 to VSC ?

ES6 is just the name of the most recent version of JavaScript. You shouldn’t need to add anything.

ES6 is not the most recent version of JS for sure, is 2015 one I think.

Use Gulp or Webpack to transform your code with babel.

Fair enough. The most recent significant revision (from a syntax perspective) I suppose is what I meant.

What compelled me to ask this was this:

What does this mean, beyond the obvious I mean.
Is it something to concern about ?

By default, JSHint uses ES5 (I think) as a baseline (whatever was the ES version 10 years ago I guess). You need to specify you’re using a newer version in the config:

You’re probably going to get some issues (as an example, JSLint only added support for ES2017 last year). I realise you’re finding ESlint has too many options*, but you’re trying to switch to a linter that isn’t really used much nowadays (it was great ten years ago, but that was ten years ago).

* (which you can use as few or as many as you want, you can literally delete them in the config)

When I do a Google search a handful of linters pops including usually ESLint and JSHint.
JS lint seemed like I couldnt figure out how to use it.
I think I already asked you what linter to use for obvious syntax errors without getting too fancy ?

And I said, use ESLint, it has the most support. You should be able to just have a config file like:

// syntax is for an .eslintrc.js file
module.exports = {
  "env": {
    "browser": true,
    "commonjs": true, 
    "es6": true,
  "extends": "eslint:recommended",

That should be it, then you add things as you want/need them

    "env": {
        "browser": true,
        "es6": true
    "extends": "eslint:recommended",
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    "parserOptions": {
        "ecmaVersion": 2018
    "rules": {
        "accessor-pairs": "error",
        "array-bracket-newline": "error",
        "array-bracket-spacing": "error",
        "array-callback-return": "error",
        "array-element-newline": "error",
        "arrow-body-style": "error",
        "arrow-parens": "error",
        "arrow-spacing": "error",
        "block-scoped-var": "error",
        "block-spacing": "error",
        "brace-style": "error",
        "callback-return": "error",
        "camelcase": "error",
        "capitalized-comments": [
        "class-methods-use-this": "error",
        "comma-dangle": "error",
        "comma-spacing": "error",
        "comma-style": "error",
        "complexity": "error",
        "computed-property-spacing": "error",
        "consistent-return": "error",
        "consistent-this": "error",
        "curly": "error",
        "default-case": "error",
        "default-param-last": "error",
        "dot-location": "error",
        "dot-notation": "error",
        "eol-last": [
        "eqeqeq": "error",
        "func-call-spacing": "error",
        "func-name-matching": "error",
        "func-names": "error",
        "func-style": "error",
        "function-call-argument-newline": "error",
        "function-paren-newline": "error",
        "generator-star-spacing": "error",
        "global-require": "error",
        "grouped-accessor-pairs": "error",
        "guard-for-in": "error",
        "handle-callback-err": "error",
        "id-blacklist": "error",
        "id-length": "error",
        "id-match": "error",
        "implicit-arrow-linebreak": "error",
        "indent": "error",
        "indent-legacy": "error",
        "init-declarations": "error",
        "jsx-quotes": "error",
        "key-spacing": "error",
        "keyword-spacing": "error",
        "line-comment-position": "error",
        "linebreak-style": [
        "lines-around-comment": "error",
        "lines-around-directive": "error",
        "lines-between-class-members": "error",
        "max-classes-per-file": "error",
        "max-depth": "error",
        "max-len": "off",
        "max-lines": "error",
        "max-lines-per-function": "error",
        "max-nested-callbacks": "error",
        "max-params": "error",
        "max-statements": "error",
        "max-statements-per-line": "error",
        "multiline-comment-style": [
        "multiline-ternary": "error",
        "new-cap": "error",
        "new-parens": "error",
        "newline-after-var": [
        "newline-before-return": "error",
        "newline-per-chained-call": "error",
        "no-alert": "error",
        "no-array-constructor": "error",
        "no-await-in-loop": "error",
        "no-bitwise": "error",
        "no-buffer-constructor": "error",
        "no-caller": "error",
        "no-catch-shadow": "error",
        "no-confusing-arrow": "error",
        "no-console": "off",
        "no-constructor-return": "error",
        "no-continue": "error",
        "no-div-regex": "error",
        "no-dupe-else-if": "error",
        "no-duplicate-imports": "error",
        "no-else-return": "error",
        "no-empty-function": "error",
        "no-eq-null": "error",
        "no-eval": "error",
        "no-extend-native": "error",
        "no-extra-bind": "error",
        "no-extra-label": "error",
        "no-extra-parens": "error",
        "no-floating-decimal": "error",
        "no-implicit-coercion": "error",
        "no-implicit-globals": [
                "lexicalBindings": false
        "no-implied-eval": "error",
        "no-import-assign": "error",
        "no-inline-comments": "error",
        "no-invalid-this": "error",
        "no-iterator": "error",
        "no-label-var": "error",
        "no-labels": "error",
        "no-lone-blocks": "error",
        "no-lonely-if": "error",
        "no-loop-func": "error",
        "no-magic-numbers": "off",
        "no-mixed-operators": "error",
        "no-mixed-requires": "error",
        "no-multi-assign": "error",
        "no-multi-spaces": "error",
        "no-multi-str": "error",
        "no-multiple-empty-lines": "error",
        "no-native-reassign": "error",
        "no-negated-condition": "error",
        "no-negated-in-lhs": "error",
        "no-nested-ternary": "error",
        "no-new": "error",
        "no-new-func": "error",
        "no-new-object": "error",
        "no-new-require": "error",
        "no-new-wrappers": "error",
        "no-octal-escape": "error",
        "no-param-reassign": "error",
        "no-path-concat": "error",
        "no-plusplus": "error",
        "no-process-env": "error",
        "no-process-exit": "error",
        "no-proto": "error",
        "no-restricted-globals": "error",
        "no-restricted-imports": "error",
        "no-restricted-modules": "error",
        "no-restricted-properties": "error",
        "no-restricted-syntax": "error",
        "no-return-assign": "error",
        "no-return-await": "error",
        "no-script-url": "error",
        "no-self-compare": "error",
        "no-sequences": "error",
        "no-setter-return": "error",
        "no-shadow": "error",
        "no-spaced-func": "error",
        "no-sync": "error",
        "no-tabs": "error",
        "no-template-curly-in-string": "error",
        "no-ternary": "error",
        "no-throw-literal": "error",
        "no-undef-init": "error",
        "no-undefined": "error",
        "no-underscore-dangle": "error",
        "no-unmodified-loop-condition": "error",
        "no-unneeded-ternary": "error",
        "no-unused-expressions": "error",
        "no-use-before-define": "error",
        "no-useless-call": "error",
        "no-useless-computed-key": "error",
        "no-useless-concat": "error",
        "no-useless-constructor": "error",
        "no-useless-rename": "error",
        "no-useless-return": "error",
        "no-var": "error",
        "no-void": "error",
        "no-warning-comments": "error",
        "no-whitespace-before-property": "error",
        "nonblock-statement-body-position": "error",
        "object-curly-newline": "error",
        "object-curly-spacing": "error",
        "object-property-newline": "error",
        "object-shorthand": "error",
        "one-var": "off",
        "one-var-declaration-per-line": "error",
        "operator-assignment": [
        "operator-linebreak": "error",
        "padded-blocks": "error",
        "padding-line-between-statements": "error",
        "prefer-arrow-callback": "error",
        "prefer-const": "off",
        "prefer-destructuring": "error",
        "prefer-exponentiation-operator": "error",
        "prefer-named-capture-group": "error",
        "prefer-numeric-literals": "error",
        "prefer-object-spread": "error",
        "prefer-promise-reject-errors": "error",
        "prefer-reflect": "error",
        "prefer-regex-literals": "error",
        "prefer-rest-params": "error",
        "prefer-spread": "error",
        "prefer-template": "error",
        "quote-props": "error",
        "quotes": [
        "radix": "error",
        "require-atomic-updates": "error",
        "require-await": "error",
        "require-jsdoc": "error",
        "require-unicode-regexp": "error",
        "rest-spread-spacing": "error",
        "semi": "error",
        "semi-spacing": "error",
        "semi-style": [
        "sort-imports": "error",
        "sort-keys": "error",
        "sort-vars": "error",
        "space-before-blocks": "error",
        "space-before-function-paren": "error",
        "space-in-parens": [
        "space-infix-ops": "error",
        "space-unary-ops": "error",
        "spaced-comment": [
        "strict": "error",
        "switch-colon-spacing": "error",
        "symbol-description": "error",
        "template-curly-spacing": [
        "template-tag-spacing": "error",
        "unicode-bom": [
        "valid-jsdoc": "error",
        "vars-on-top": "error",
        "wrap-iife": "error",
        "wrap-regex": "error",
        "yield-star-spacing": "error",
        "yoda": "error"

This is what was added to my project folder when I did the install as per the instructions on the ESLint website.

Does it look right ? are these the rules I can override ? are there other syntax rules that are not listed here, like the ones for errors that are ‘breakable’ to the code running properly ?

I mean, that’s every single rule you could possibly have, all set to error. You could just delete everything except the "extends": "eslint:recommended", line and it will probably be fine. ESLint just looks at that config file and for every rule, will do what it says. Which is error.

ESLint comes with a large number of rules. You can modify which rules your project uses either using configuration comments or configuration files. To change a rule setting, you must set the rule ID equal to one of these values:

  • "off" or 0 - turn the rule off
  • "warn" or 1 - turn the rule on as a warning (doesn’t affect exit code)
  • "error" or 2 - turn the rule on as an error (exit code is 1 when triggered)

What options have you selected when you ran the init script? Because if I pick some standard options, I get (for example)

module.exports = {
    "env": {
        "browser": true,
        "es6": true
    "extends": "eslint:recommended",
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    "parserOptions": {
        "ecmaVersion": 2018,
        "sourceType": "module"
    "rules": {

Note that the rules field is empty: the rules you add there override the default settings. It’s your config, you can override anything you want, but what your config says is “use the recommended settings, then override every single rule to make sure ESLint causes an error instead of being ignored or warning”. Here is every possible rule:

And I’ve tried several different permutations here, I am unsure how you’ve managed to create this insanely strict config file.

1 Like

Probably unwittingly during the series of questions during the installation process in the terminal as per the instructions on eslint website.

Just delete every property in “rules”.

Ok. Will do. what about the remaining top part ?

Will removing all the rules also stop some of the formatting / white space checking to stop?