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Es2017 is not es6;es2017, also known as es8, and es6 are two versions. Es2017 is the eighth version of ECMAScript released in 2017, so it can also be referred to as es8; for short, while es6 is the sixth version of ECMAScript released in 2015, also known as es2015.

The operating environment of this tutorial: windows7 system, ECMAScript 8&&ECMAScript version 6, Dell G3 computer.

Es2017 is not es6.

Es2017, also known as es8, and es6 are two versions.

Brief introduction of "es"

The full name of es is "ECMAScript". Every time you see ES followed by a number, it is a different version of ECMAScript. In fact, there are eight versions. Let's take a closer look at this:

ES1 、 ES2 、 ES3 、 ES4

ES1:1997 June  -  ES2:1998 June  -  ES3:1999 December  -  ES4: failed

I put it all together. This is the first four versions of ECMAScript, here is a brief review. Just let you know that the first three versions come out one per year, while the fourth version failed for political reasons.

ES5

December 2009: nearly 10 years later, ES5 was released in 2009. The next version of ECMAScript took six years to release.

ES6 / ES2015

June 2015: maybe this is where the confusion begins. As you can see, ES6 and ES2015 are actually the same thing.

The name that was promoted at first was ES6. However, the organizing committee requires that ECMAScript must be updated once a year. As a result, this version is renamed ES 2015 and needs to be updated every year with the suffix of the current year.

ES2016 (ES7)

June 2016: 7th version of ECMAScript.

ES2017 (ES8)

June 2017: 8th version of ECMAScript.

ES.Next

You may see the appearance of ES.Next. This is an unstable version, a fruit before the next version.

Why are you doing this?

Because each release brings updates and new features to the language.

Key points

ECMAscript is updated every year.

ECMAScript is named in numerical order, starting with 1: ES1, ES2, ES3, ES4, ES5

The new version (from 2015) ES is named by year: ES2015, ES2016, ES2017

ECMAScript is a standard. JavaScript is a popular implementation language of the ES standard. Other implementing standard languages are SpiderMonkey, V8, and ActionScript.

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