Ecmascript 4 (CloudMonk.io)

ECMAScript 4 - JavaScript ES4



#redirect ECMAScript 4 - JavaScript ES4

ECMAScript - ES4

Return to JavaScript History, ECMAScript, JavaScript Versions (ECMAScript Version History), JavaScript Topics

Your request poses a unique challenge due to the nature of ECMAScript 4 (ES4). The reality is that ES4 was a proposed version of the ECMAScript standard that was never officially released. The work on ES4 was abandoned, and the community moved directly from ECMAScript 3 to ECMAScript 5, with some features intended for ES4 being incorporated into later versions of ECMAScript. Given this context, it's not possible to provide direct links to official documentation, GitHub repos, or an official website for ES4, as it was never formalized or published in the manner of its successors.

However, I can discuss some of the planned features and concepts that were associated with ES4, comparing them to how they eventually were introduced in ECMAScript 5+, as well as to similar features in TypeScript, Java, and Python. I'll frame this information within the constraints you've outlined, focusing on the spirit of your request rather than the impossible specifics.

Classes


ECMAScript 4 planned to introduce classes, a concept familiar to developers from object-oriented languages like Java and Python. Classes in ES4 aimed to provide a clearer and more structured way to create objects and manage inheritance compared to the prototype-based approach in earlier JavaScript versions.

JavaScript (ES6):
```javascript
class Person {
constructor(name) {
this.name = name;
}

sayHello() {
console.log(`Hello, my name is ${this.name}`);
}
}
```

TypeScript:
TypeScript, being a superset of JavaScript, supports classes very similarly to how they are implemented in ES6 and beyond.

Java:
```java
public class Person {
private String name;

public Person(String name) {
this.name = name;
}

public void sayHello() {
System.out.println("Hello, my name is " + name);
}
}
```

Python:
```python
class Person:
def __init__(self, name):
self.name = name

def say_hello(self):
print(f"Hello, my name is {self.name}")
```

Type Annotations


Type Annotations were a feature planned for ES4 to allow developers to specify the type of variables, parameters, and return values. TypeScript, developed by Microsoft, adopted and expanded upon this concept.

TypeScript:
```typescript
function add(x: number, y: number): number {
return x + y;
}
```

In JavaScript (ES6 and beyond), type annotations are not supported natively. For type checking, developers use TypeScript or Flow.

Java:
Java has always enforced type declarations, making it straightforward to define the type of variables, parameters, and return values.

Python:
Python introduced optional type hints in Python 3.5, allowing for a similar, though not enforced, way to annotate types.

Modules


Modules were another important feature planned for ES4, aiming to provide a standard way to organize and reuse code across different files.

JavaScript (ES6):
```javascript
// file: math.js
export function sum(x, y) {
return x + y;
}

// file: app.js
import { sum } from './math.js';

console.log(sum(1, 2));
```

TypeScript:
TypeScript uses the same module system as ES6, benefiting from its ability to import and export modules.

Java:
Java uses packages and imports to achieve modularity. Java 9 introduced the module system, further enhancing this capability.

Python:
Python uses modules and packages, allowing for the organization of code into reusable components.

Structural Types and Duck Typing


ES4 aimed to introduce structural types, akin to the concept of duck typing in dynamic languages like Python.

In JavaScript (ES5 and beyond) and TypeScript, objects are often used in a way that resembles duck typing, where the shape of the object is more important than its specific type.

Python:
```python
def fly(entity):
entity.fly()
```
In this Python example, any object passed to `fly` that has a `fly` method will work, demonstrating duck typing.

Conclusion


While ECMAScript 4 was never officially released, many of its proposed features influenced later versions of JavaScript and the development of TypeScript. Comparing these features to those in Java and Python shows the evolving nature of programming languages and the convergence of ideas across different ecosystems.

Given the nature of ES4's history, direct links to documentation, repos, or official websites for ES4 itself cannot be provided. However, for current JavaScript features and documentation, one can refer to [Mozilla Developer Network (MDN)](https://developer.mozilla.org/en-US/docs/Web/JavaScript) and [ECMAScript's official website](https://www.ecma-international.org/publications-and-standards/standards/ecma-262/) for the latest standards. For TypeScript, the

[official TypeScript website](https://www.typescriptlang.org/) is the best resource.

https://en.wikipedia.org/wiki/ECMAScript_version_history

Error: File not found: wp>ECMAScript version history

JavaScript Version History: JavaScript, ECMAScript. ECMAScript 2022 (2022), ECMAScript 2021 (2021), ECMAScript 2020 (2020), ECMAScript 2019 (2019), ECMAScript 2018 (2018), ECMAScript 2017 (2017), ECMAScript 2016 (2016), ECMAScript 2015 (2015), ECMAScript 5.1 (2011), ECMAScript 5 (2009), ECMAScript 4 (2009), ECMAScript 3 (1999), ECMAScript 2 (1998), JavaScript 1.5 (2000), JavaScript 1.4 (1998), JavaScript 1.3 (1996), JavaScript 1.2 (1997), JavaScript 1.1 (1996, JavaScript 1.0 (1997. (navbar_javascript_versions - see also navbar_javascript, navbar_typescript_versions

JavaScript: JavaScript Fundamentals, JavaScript Inventor - JavaScript Language Designer: Brendan Eich of Netscape on December 4, 1995; JavaScript DevOps - JavaScript SRE, Cloud Native JavaScript (JavaScript on Kubernetes - JavaScript on AWS - JavaScript on Azure - JavaScript on GCP), JavaScript Microservices, JavaScript Containerization (JavaScript Docker - JavaScript on Docker Hub), Serverless JavaScript, JavaScript Data Science - JavaScript DataOps - JavaScript and Databases (JavaScript ORM), JavaScript ML - JavaScript DL, Functional JavaScript (1. JavaScript Immutability, 2. JavaScript Purity - JavaScript No Side-Effects, 3. JavaScript First-Class Functions - JavaScript Higher-Order Functions, JavaScript Lambdas - JavaScript Anonymous Functions - JavaScript Closures, JavaScript Lazy Evaluation, 4. JavaScript Recursion), Reactive JavaScript), JavaScript Concurrency (WebAssembly - WASM) - JavaScript Parallel Programming - Async JavaScript - JavaScript Async (JavaScript Await, JavaScript Promises, JavaScript Workers - Web Workers, Service Workers, Browser Main Thread), JavaScript Networking, JavaScript Security - JavaScript DevSecOps - JavaScript OAuth, JavaScript Memory Allocation (JavaScript Heap - JavaScript Stack - JavaScript Garbage Collection), JavaScript CI/CD - JavaScript Dependency Management - JavaScript DI - JavaScript IoC - JavaScript Build Pipeline, JavaScript Automation - JavaScript Scripting, JavaScript Package Managers (Cloud Monk's Package Manager Book), JavaScript Modules - JavaScript Packages (NPM and JavaScript, NVM and JavaScript, Yarn Package Manager and JavaScript), JavaScript Installation (JavaScript Windows - Chocolatey JavaScript, JavaScript macOS - Homebrew JavaScript, JavaScript on Linux), JavaScript Configuration, JavaScript Observability (JavaScript Monitoring, JavaScript Performance - JavaScript Logging), JavaScript Language Spec - JavaScript RFCs - JavaScript Roadmap, JavaScript Keywords, JavaScript Operators, JavaScript Functions, JavaScript Built-In Data Types, JavaScript Data Structures - JavaScript Algorithms, JavaScript Syntax, JavaScript OOP (1. JavaScript Encapsulation - 2. JavaScript Inheritance - 3. JavaScript Polymorphism - 4. JavaScript Abstraction), JavaScript Design Patterns - JavaScript Best Practices - JavaScript Style Guide - Clean JavaScript - JavaScript BDD, JavaScript Generics, JavaScript I/O, JavaScript Serialization - JavaScript Deserialization, JavaScript APIs, JavaScript REST - JavaScript JSON - JavaScript GraphQL, JavaScript gRPC, JavaScript on the Server (Node.js-Deno-Express.js), JavaScript Virtualization, JavaScript Development Tools: JavaScript SDK, JavaScript Compiler - JavaScript Transpiler - Babel and JavaScript, JavaScript Interpreter - JavaScript REPL, JavaScript IDEs (Visual Studio Code, JavaScript Visual Studio Code, Visual Studio, JetBrains WebStorm, JetBrains JavaScript), JavaScript Debugging (Chrome DevTools), JavaScript Linter, JavaScript Community - JavaScriptaceans - JavaScript User, JavaScript Standard Library (core-js) - JavaScript Libraries (React.js-Vue.js-htmx, jQuery) - JavaScript Frameworks (Angular), JavaScript Testing - JavaScript TDD (JavaScript TDD, Selenium, Jest, Mocha.js, Jasmine, Tape Testing (test harness), Supertest, React Testing Library, Enzyme.js React Testing, Angular TestBed), JavaScript History, JavaScript Research, JavaScript Topics, JavaScript Uses - List of JavaScript Software - Written in JavaScript - JavaScript Popularity, JavaScript Bibliography - Manning JavaScript Series- JavaScript Courses, JavaScript Glossary - JavaScript Official Glossary - Glossaire de JavaScript - French, TypeScript, Web Browser, Web Development, HTML-CSS, JavaScript GitHub, Awesome JavaScript, JavaScript Versions. (navbar_javascript - see also navbar_web_development, navbar_javascript_networking, navbar_javascript_versions, navbar_javascript_standard_library, navbar_javascript_libraries, navbar_javascript_reserved_words, navbar_javascript_functional, navbar_javascript_concurrency, navbar_javascript async, navbar_typescript)

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