Exploring JavaScript - Scopes

Deep understanding of jаvascript's Scope System and the compilation phase of JS programs

How JS Scope is organised using function declaration, function expressions and blocks.

Why IIFE works the way it does, what hoisting really is and how can we effectively organise our code using the knowledge of scopes.

Be able to understand basic jаvascript program

jаvascript is that language that you need to know in order to build applications that work across the platforms and knowing about the JS from the point of the language specification is really important.

In this course we will cover the most neglected topic in jаvascript which is scopes. The course is heavily inspired from the Chapter 8 of the ECMAScript Specification. Although the Chapter 8 of the spec talk about Execution context, Agents, Job, Executing Context Stack et al, however in this course we will stick closer to the lexical environment and its sub parts.

Scopes system is one of the strongest pillars of jаvascript. Scopes not only touches the execution phase but it starts from the code authoring and extends its root in the compilation phase.

The course discusses every detail of how the scope is created and how does jаvascript ee deal with the code structure to come up with a blueprint which is then handed over to the Execution Ee. We will go in-depth in understanding how our program is processed by the compiler and what steps lead to the creation of scope.

We will cover the fundamentals of code patterns that helps us create a better organized code. We will look at how function expression, function declaration, blocks, modules and scripts are part of the scope system. We will cover in-depth detail of how and why immediately invoked function expressions (IIFE) works. We will also look at hoisting and by the we reach here, you would have already understood why hoisting is something, that it actually is not.

Finally we will look at the essential ES6 feature i.e. let, const and var and understand why their behavior and what are the effects of using one over the other. What you will learn in this course will make you a stronger jаvascript developer, improve your abilities in writing solid JavaScrip code and it will lead you into understanding some of advanced concepts of the jаvascript like closures, higher order functions and module pattern.

Bner JS developers who would want to learn jаvascript

Advanced/Intermediate JS developers who want to get deeper understanding of scope system and compilation phase of JS programs

JS developers who want to start exploring the new ES6 features

JS developers who want to understand how scopes works in jаvascript




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