"ECMAScript has grown to be one of the world’s most widely used general purpose programming languages. It is best known as the language embedded in web browsers but has also been widely adopted for server and embedded applications." —ECMA International Language Specification
Starting with the 6th edition (commonly known as ES2015 or ES6) in 2015, a new edition of the standard will be released each year. ES2015 was a major update which brought many enhancements over ES5, including notably template strings, expressive arrow function syntax, and cleaner syntax for defining classes. Support in current browsers is incomplete, and often requires transpilation with a tool like Babel.
Help us explain this better! File a GitHub issue at https://github.com/exercism/ecmascript/issues if you have suggestions, or submit a patch with improvements to the https://github.com/exercism/ecmascript/blob/master/docs/ABOUT.md file.
If you've downloaded the command-line client and have ECMAScript installed on your machine, then go ahead and fetch the first problem.
exercism fetch ecmascript
In order to be able to submit your solution, you'll need to configure the client with your Exercism API key.
exercism configure --key=YOUR_EXERCISM_KEY
When you've written a solution, submit it to the site. You'll have to configure the command-line client with your exercism API key before you can submit.
exercism submit PATH_TO_FILE