The only change to JavaScript syntax introduced in ECMAScript 2016 is the exponentiation operator, which is a mathematical operation that applies an exponent to a base. TC-39 expects to use the year-based naming system for all future ECMAScript editions.ĮCMAScript 2016 was finalized in March 2016 and contained only three additions to the language: a new mathematical operator, a new array method, and a new syntax error. As a result, ECMAScript 6 is also known as ECMAScript 2015, and ECMAScript 7 is formally known as ECMAScript 2016. To signify this change, new versions of the specification no longer prominently feature the edition number, and instead refer to the year in which the specification was published.
More frequent releases mean that each new edition of ECMAScript should have fewer new features than ECMAScript 6. Instead, they moved to a yearly release cycle to ensure new language features would make it into development sooner. The development of ECMAScript 6 took about four years, and after that, TC-39 decided that such a long development process was unsustainable. Appendix B: Understanding ECMAScript 7 (2016)
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