JavaScript Programming Fundamentals

These flashcards cover fundamental concepts, advantages, and operators of the JavaScript programming language, along with its history and application in web development.

JavaScript

A high-level, dynamic, untyped, and interpreted programming language.

Prototype-based language

A type of programming language where inheritance is accomplished through a prototype rather than classes.

Reduced server interaction

Allows validation of user input before sending it to the server, minimizing unnecessary requests.

Immediate feedback

Allows users to see if they made input errors without a page reload.

Client-side JavaScript

JavaScript that runs in a user's browser and cannot read or write files for security reasons.

Brendan Eich

The creator of JavaScript, who developed it in May 1995.

DOM

Document Object Model, the interface that browsers provide for manipulating HTML and XML documents with JavaScript.

Variable declaration

The process of creating a variable, typically using keywords like var, let, or const in JavaScript.

Arithmetic Operators

Operators that perform mathematical calculations such as addition, subtraction, multiplication, and division.

Data Types in JavaScript

Categories of values including Numeric, String, and Boolean.

Comparison Operators

Operators that compare values, returning a boolean result based on the comparison.

Logical Operators

Operators that combine boolean values or expressions, such as AND, OR, and NOT.

Assignment Operator

An operator used to assign a value to a variable.

Inline JavaScript

JavaScript code written directly within HTML elements as event handlers.

External JavaScript file

A separate JavaScript file that can be linked to an HTML document using the

Valid Variable Name

A name for a variable that follows JavaScript naming conventions.

let keyword

Used for declaring variables that are block-scoped and can be reassigned.

const keyword

Used for declaring variables that are block-scoped and cannot be reassigned once initialized.

var keyword

Used for declaring variables that are function-scoped or globally-scoped, and can be reassigned.

Scope in JavaScript

Determines the accessibility of variables, functions, and objects in different parts of your code.

JavaScript Functions

Blocks of code designed to perform a particular task, which can be defined once and executed multiple times.

JavaScript Comments

Used to explain code and make it more readable, ignored by the JavaScript engine. Can be single-line (//) or multi-line (/* */).

What is JavaScript Event Handling?

A mechanism that allows JavaScript to respond to user actions (e.g., clicks, key presses) or browser events (e.g., page load).

What are JavaScript Conditional Statements?

Statements that execute different actions based on different conditions, primarily using if, else if, and else constructs.

What are JavaScript Loops?

Control structures that repeatedly execute a block of code as long as a specified condition is true, including for, while, and do…while loops.

What is a JavaScript Array?

A single variable used to store multiple values, typically an ordered collection of elements, accessed by an index.

What is a JavaScript Object?

A non-primitive data type that stores properties as key-value pairs, where values can be primitive types, functions, or even other objects.