JavaScript Reserved Keywords: Reserved keywords as of ECMAScript 2015

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JavaScript statements begin with a "reserved keyword" and perform a specific task. For example, the "var" keyword instructs the browser to create a variable. This article provides a list of the keywords used in JavaScript. It is important to remember that a "variable" or "function" cannot use keywords. This is another interactive reference to use as you learn to write JavaScript statements.

Reserved keywords as of ECMAScript 2015

Please select a keyword to learn about the syntax and run an example.

break
case
catch
class
const
continue
debugger
default
delete
do
else
export
extends
finally
for
function
if
import
in
instanceof
new
return
super
switch
this
throw
try
typeof
var
void
while
with
yield

Source: Mozilla, https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#keywords
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.

Course Introduction

Course Syllabus

Unit 1: HTML and CSS Prerequisite Overview

1.1: Introduction to HTML

HTML Basics

Practice: HTML Text Fundamentals

Working with Files: Folder Structure and Naming Conventions

Example in Action: Working with Basic HTML

Practice Review: Creating a Simple Webpage

1.2: Introduction to CSS

What is CSS?

Getting Started with CSS Rules

Example in Action: Working with Inline CSS

Practice: Develop a Webpage Using HTML and CSS

Study Session Review Video

PRDV401 Study Session 1

Unit 1 Assessment

Unit 1 Assessment

Unit 2: Introduction to JavaScript

2.1: JavaScript Overview

A Brief History of JavaScript

What is JavaScript?

Why JavaScript?

2.2: Getting Started

2.3: Adding JavaScript to a Webpage

JavaScript and HTML

Using the &lt;script&gt; Element to Link External Files

Example in Action: Incorporating Javascript in a Webpage

Practice: Run "Hello World"

2.4: Debugging JavaScript

What is Debugging?

Validating JavaScript

Example in Action: Install and Use JSHint in the Sublime Text

Study Session Review Video

PRDV401 Study Session 2

Unit 2 Assessment

Unit 2 Assessment

Unit 3: Values, Variables, and Statements

3.1: Data Types and Values

Introduction to DataTypes and Values

Example in Action: JavaScript Data Types

Practice: Immutable vs. Mutable in JavaScript

3.2: Variables and Strings

What is a Variable?

Identifier and Variable Names

Example In Action: String Variables

3.3: JavaScript Operators

Expressions and Operators Reference

More on JavaScript Operators

Assignment vs. Equality Operator

Expressions and Operators Reference (3.3)

Try It (3.3)

3.4: Introduction to JavaScript Statements

What is a Statement?

JavaScript Reserved Keywords

Block Statements

JavaScript Statement Syntax

Practice: Data Types and Arithmetic Operators

Practice Review: Using "var", "let", and "const" Statements

Keywords (3.4)

Try It (3.4)

Study Session Review Video

PRDV401 Study Session 3

Unit 3 Assessments

Unit 3 Assessment

Unit 4: Conditional Statements and Control Flow

4.1: Introduction to Conditional Statements

What is Control Flow?

4.2: Selection Control Statements

"if...else" Statements

Example in Action: "switch" Statement with a "break"

4.3: Looping Statements

"while" Statements

Example in Action: "for" Statement

"do...while" Statement

Practice Review: Fix the Switch Statement

Study Session Review Video

PRDV401 Study Session 4

Unit 4 Assessment

Unit 4 Assessment

Using the <script> Element to Link External Files