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JavaScript - Part 9 (Scope Chain)

Scope Chain At the beginning I would like to talk about a similar case as we had in the last part. function a() { console.log(myVar); } function b() { var myVar = 2; a(); } var myVar = 1; ...

Bartek

Bartosz Łogwiniuk

JavaScript - Part 8 (Variable Environments)

When we talk about JavaScript and how it works under the hood we can't forget about Variable Environments. It's related to the Function Execution Context too. Variable Environments There were onl...

Bartek

Bartosz Łogwiniuk

JavaScript - Part 7 (Invocation, Execution Stack)

In this post, I want to discuss one of the most important topics, which in a way is connected with the issue from the previous part. However, before we get to it, I want to explain quickly what Inv...

Bartek

Bartosz Łogwiniuk

Creating dynamic attribute accessors

Metaprogramming, the art of messing with the internals of a programming language, is one of the most powerful learning tools an aspiring programmer can utilize. It's very easy to take the workings ...

Pawel

Paweł Bartulewicz

JavaScript - Part 6 (Single Threaded, Synchronous)

This part will be the shortest of all, but before the next posts, I would like to discuss these two concepts. Although the explanations provided here will be useful in subsequent posts, I think tha...

Bartek

Bartosz Łogwiniuk

JavaScript - Part 5 (Execution Context: Execution Phase)

Execution Context: (Code) Execution Phase As you recall from the previous part, I mentioned that there are two phases that take place in the Execution Context. The first is Creation Phase, the sec...

Bartek

Bartosz Łogwiniuk

JavaScript - Part 4 (Hoisting, Execution Context: Creation Phase)

In the current post I would like to develop some of what was discussed in part 3. At the beginning, we'll slightly change our one.js JavaScript file. var a = "Hello"; function b() { console.l...

Bartek

Bartosz Łogwiniuk

JavaScript - Part 3 (Global Object)

In this part, I would like to raise one topic. Global Object. Let's start. In a situation where we have already written our first JavaScript program that for example is a function displaying "Hell...

Bartek

Bartosz Łogwiniuk

JavaScript - Part 2 (Name/Value Pair, Object)

Name / Value Pair When it comes to JavaScript, Objects are very important, but before that, I would like to talk about Name / Value Pair. It is quite simple and the term itself tells us what we ar...

Bartek

Bartosz Łogwiniuk

JavaScript - Part 1 (Syntax Parser, Lexical Environment, Execution Context)

Introduction Hey everyone. I decided to write a series about the most popular web language - JavaScript. The series will be addressed mainly to people who start their adventure with programming an...

Bartek

Bartosz Łogwiniuk