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JavaScript Variables Lifecycles

Understand JavaScript Engine phases and lifecycles of the "var", "let", "const". Scopes, hoisting, closures simplified.

Beginner 0(0 Ratings) 4 Students enrolled
Created by Editiorial Team Last updated Thu, 09-Apr-2020 English

SEMrush

JavaScript Variables Lifecycles Free Tutorial Download

What will i learn?
  • Explain difference between global scope, function scope and block scope
  • Understand how variables declared using
  • Explain difference between
  • Practice different variables declarations types

Curriculum for this course
1 Lessons 00:00:00 Hours
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1 Lessons 00:00:00 Hours
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Requirements
  • Basic JavaScript knowledge
  • Fundamentals of CSS
  • Basic understanding of HTML
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Description
Description

Do you want to understand real difference between different types of variables in JavaScript?

Understand different types of scopes?

Want easily explain what is hoisting?

What about closures?

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In this course I will dive deep into the JavaScript and explain you what happens under the hood when you declare any variable or function. You will understand what happens on the "Compilation" and "Execution" phases in JavaScript Engine.

I will make explain you what is variable declarationinitialization and assignment that are all-together called Variable Lifecycle Phases.

We will also focus in this course on the Variables Usage Guidelines:

  1. Make Code clear and readable for others

  2. Always declare variables before first usage

  3. Always use "use strict" globally

  4. Don't expose to the outer scopes local variables

You will also get several practical exercises where you will need to apply gain knowledge about different variables, hoisting, scopes and closures.

All exercises and code samples are available as Git repository.

Hope to see you onboard!

Who this course is for:
  • JavaScript developers
  • Front-end developers
  • Full-stack developers
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