Why does JSHint throw a warning if I am using const?

Question

This is the error I get when using const:

Answer 1

May 2020 Here's a simple solution i found and it will resolve for all of my projects ,on windows if your project is somewhere inside c: directory , create new file .jshintrc and save it in C directory open this .jshintrc file and write { "esversion": 6} and that's it. the warnings should go away , same will work in d directory

yes you can also enable this setting for the specific project only by same creating a .jshintrc file in your project's root and adding { "esversion": 6}

Answer 2

Create a file called, say jshint_opts with this content: { "esversion": 6 }

Then invoke jshint with something like this command line:

jshint --config jshint_opts lib/*.js

Answer 3

You can specify esversion:6 inside jshint options object. Please see the image. I am using grunt-contrib-jshint plugin.

Answer 4

If using Sublime Text 3:

• Go to Preferences -> Settings
• Under Preferences.sublime-settings—User add "esversion": 6

Answer 5

When relying upon ECMAScript 6 features such as const, you should set this option so JSHint doesn't raise unnecessary warnings.

/*jshint esnext: true */ (Edit 2015.12.29: updated syntax to reflect @Olga's comments)

/*jshint esversion: 6 */

const Suites = {
    Spade: 1,
    Heart: 2,
    Diamond: 3,
    Club: 4
};

This option, as the name suggests, tells JSHint that your code uses ECMAScript 6 specific syntax. http://jshint.com/docs/options/#esversion

Edit 2017.06.11: added another option based on this answer.

While inline configuration works well for an individual file, you can also enable this setting for the entire project by creating a .jshintrc file in your project's root and adding it there.

{
  "esversion": 6
}