ECMA-262-5 in detail. Chapter 0. Introduction.

We have finished analysis of the most important parts and theoretical aspects concerning 3rd edition of the ECMA-262 specification, i.e. standard devoted ECMAScript programming language. We have done and achieved a lot. Originally written in Russian, this series after more than half an year has been translated to several languages, what allowed this information to be shared with JavaScript developers and with everyone who interested in deep ECMAScript allover the world. Continue reading

ECMA-262-3 in detail. Chapter 8. Evaluation strategy

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Note: this article was revisited and updated on Feb 10th, 2020

Introduction

In this small note we will consider strategy of passing arguments to functions in ECMAScript.

In general this part of computer science is known as evaluation strategy, that is, a set of rules for evaluating semantics of some expressions. The strategy of passing arguments to functions is one of its cases. Continue reading

ECMA-262-3 in detail. Chapter 5. Functions.

Read this article in: Russian, Chinese (version 1, version 2), French.

Introduction

In this article we will talk about one of the general ECMAScript objects — about functions. In particular, we will go through various types of functions, will define how each type influences variables object of a context and what is contained in the scope chain of each function. Continue reading

ECMA-262-3 in detail. Chapter 4. Scope chain.

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Introduction

As we already know from the second chapter concerning the variable object, the data of an execution context (variables, function declarations, and formal parameters of functions) are stored as properties of the variables object. Continue reading

ECMA-262-3 in detail. Chapter 2. Variable object.

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Introduction

Always in programs we declare functions and variables which then successfully use building our systems. But how and where the interpreter finds our data (functions, variable)? What occurs, when we reference to needed objects? Continue reading

ECMA-262-3 in detail. Chapter 7.2. OOP: ECMAScript implementation.

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Introduction

This is the second part of article about object-oriented programming in ECMAScript. In the first part we discussed the general theory and drew parallels with ECMAScript. Before reading of the current part, if it is necessary, I recommend reading the first part as in this article we will actively use the passed terminology. You can find the first part here: ECMA-262-3 in detail. Chapter 7.1. OOP: The general theory.
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ECMA-262-3 in detail. Chapter 7.1. OOP: The general theory.

Read this article in: Russian, French.

Introduction

In this article we consider major aspects of object-oriented programming in ECMAScript. That the article has not turned to “yet another” (as this topic already discussed in many articles), more attention will be given, besides, to theoretical aspects to see these processes from within. In particular, we will consider algorithms of objects creation, see how relationships between objects (including the basic relationship — inheritance) are made, and also give accurate definitions which can be used in discussions (that I hope will dispel some terminological and ideological doubts and messes arising often in articles on OOP in JavaScript). Continue reading

ECMA-262-3 in detail. Chapter 6. Closures.

Read this article in: Russian, French.

Introduction

In this article we will talk about one of the most discussed topics related to JavaScript — about closures. The topic, as a matter of fact, is not new and was discussed many times. However we will try to discuss and understand it more from a theoretical viewpoint, and also will look at how closures are implemented in ECMAScript.
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