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ECMAScript is the scripting language standardized by Ecma International in the ECMA-262 specification and ISO/IEC 16262.

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I am trying to wrap my head around what the ECMAScript specification suggests about variable assignment. Introduction: Coming from Java, this is pretty straight forward. Variables get stored at a ...
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Coming from languages like C++, Java or PHP I've learned that there are Value Types and Reference Types. Value Types store values directly in the variable (in a box / memory location). Whereas ...
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When reading through the ECMAScript specification, I noticed, it actually never mentions concepts like "pass by value" or "pass by reference". When looking at the assignment ...
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I'm not a frontend dev, but I recall that a few years ago, the this keyword was commonplace in frontend codebases. In recent years, I haven't seen this get used anymore. In the last few frontend ...
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I've been told on StackOverflow this questions was off-topic so I'm asking here: From this webpage (ISO/IEC 22275:2018): This International Standard defines the ECMAScript Specification Suite ...
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I am writing a client to talk to a server API in JavaScript. I have an OOP background but am trying to embrace modern EcmaScript. So I started with this: customerApi.js: const baseUrl = "http://...
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I've recently learned that setTimeout is not part of Ecma 262 standard but takes part of WhatWG one. I have one misunderstanding concerning these two standards and I can't get how they converge. For ...
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I've written a bit of code that looks like this: async function fetchData() { const json = await fetch(ENDPOINT + key.key).then(data => data.json()); //Do something with the data } It's ...
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The question is related to the resolution of the this operator in Javascript classes. NodeJS now supports ES6 classes. The problem faced during this is that when a new instance of the class is created ...
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We've built a class that allows you to easily draw stuff on a <canvas> element. That class is called Canvas. I've encapsulated the <canvas> element and the class itself in a WebComponent, ...
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I am trying to build a derivation tree for the program x = 42 using the specification for ECMAScript 2017. I see that there there is an AssignmentExpression which has the production rule: ...
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Usually on Php or in Java and in other single Inheritance Object Oriented Languages, when I am writing a software I use and Interface then and afterwards I implement the class that implements the ...
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I'm working on the design of a compiler for a language in which I have to use curly brace for two different purposes. I am currently stuck in writing a non-ambiguous grammar but I realized that some ...
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The questions are: Do generators break the functional programming paradigm? Why or why not? If yes, can generators be used in functional programming and how? Consider the following: function * ...
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There are six primitive data types in JavaScript: Boolean, Number, String, Symbol, undefined, null A WeakMap can't have primitive data types as keys. And a WeakSet can't have primitive values. Why ...
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Why doesn't Object.prototype.toString return a string representation of an object? I don't see any use for the current output and it seems that it would be more useful for the toString function to be ...
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I recently found out about JavaScript's Template Literals, and they help a lot with readability. But would it be worth changing my code from now on to these Template Literals, or should I keep using ...
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In the below visualisation, There are two array objects(cars & bikes) that are created with below syntax, var cars = new Array("Saab", "Volvo", "BMW"); var bikes = ["Honda", "Yamaha"]; whose [[...
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I heard that some sort of class system will be added to JavaScript with ECMAScript and I find that a little confusing, because I've just finished reading a JS book, JavaScript, The Good Parts by ...
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It is exciting time of having Babel and being able to use all nice nice features. It got me thinking, what happens in the future? Nobody really talks about it. I mean some browsers would eventually ...
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Plain object keys must be strings, whereas a Map can have keys of any type. But I have little use for this in practice. In nearly all cases, I find myself using strings as keys anyway. And presumably ...
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I'm a fairly experienced programmer in the .NET and Java realms, and I've started reading up on JavaScript. I bought Douglas Crockford's "The Good Parts" book, and I'm immediately put off by a few ...
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With all the noise about EC6, one thing that I realized I haven't heard about is expanding Javascript's standard library. Javascript has a fairly sparse standard library. You need a 3rd party library ...
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For example, a bit or a boolean can be either 0 or 1 so the number 2 is associated with it. Similarly, for a byte which is 8 bits, the maximum number of different assignments would be 2^8. Is there a ...
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In JavaScript, every number you will ever use will always be represented with what C programmer would call a double. The official type is I believe number. If I recall correctly, that fact was ...
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When looking at the ECMAScript 4th Edition specification here it mentions that ES3 is a simple, highly dynamic, object-based language that takes its major ideas from the languages Self and Scheme. ...
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Our company ported moderate chunks of business logic to JavaScript. We compile the code with a minifier, which further improves performance. Since the language is dynamically typed, it lends itself ...
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All this started when I was looking for a way to test my webpage for JavaScript conformance like the W3C HTML Validator. I have not found one yet. So let me know if you know of any... I looked for the ...
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I'm lately working on a few mobile web apps for Android (2.3+) and iOS (4+). Their browsers support most of ECMAScript5, which is very powerful, and I wanted to use language features where possible, ...
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During my years of web development with JavaScript, I come to the conclusion that it's an incredible powerful language, and you can do amazing things with it. It offers a rich set of features, like: ...
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