This article brings you relevant knowledge about JavaScript, which mainly introduces related issues about the relationship between JavaScript and ECMAScript. ECMAScript is also a scripting language, abbreviated as ES, which is usually regarded as the standardized specification of JavaScript. The following is Let's take a look, hope it helps everyone. 
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ECMAScript is also a scripting language, abbreviated as ES, which is usually regarded as the standardized specification of JavaScript.
But in fact, JavaScript is an extension language of ECMAScript, because ECMAScript only provides the most basic syntax. In layman's terms, it just stipulates how to write our code, such as defining variables and functions, loops and branches... It just stays at the language level and does not It cannot be used to complete actual functional development in our application.
JavaScript implements the ECMAScript language standard and makes some extensions on this basis, allowing us to operate DOM and BOM in the browser environment, and read and write files in the node environment.
In a browser environment, JavaScript = ECMAScript + BOM + DOM
In the node environment, JavaScript = ECMAScript + Node APIs
Therefore, the language itself in JavaScript refers to ECMAScript.
ECMAScript2015 is worth taking out and understanding separately.
Because ES2015 has been too long since the previous version and too much content was released, this version includes many disruptive new features.
It is worth noting that ES2015 starts to be named according to the year and no longer named according to the version number.
With the rapid development of the web, ES has maintained a version iteration every year since 2015.
In November 1996, Netscape, the creator of JavaScript, decided to hand over JavaScript to the International Standardization Organization ECMA, hoping that this language could become an international standard. The following year, ECMA released the first version of Standard Document 262 (ECMA-262), which specified the standard for browser scripting languages and called this language ECMAScript.
This standard has been formulated for the JavaScript language from the beginning, but it is not called JavaScript for the following two reasons: First, it is a trademark. Java is a registered trademark of Sun. According to the licensing agreement, only Netscape can legally use it. The name JavaScript, and JavaScript itself, have been registered as trademarks by Netscape. The second is to show that the developer of this language is ECMA, not Netscape, which will help ensure the openness and neutrality of this language.
The relationship between the two can be summarized as follows: ECMAScript is the specification of JavaScript, and JavaScript is the implementation of ECMAScript. (ECMAScript also has dialect names JScript and ActionScript)