Introduction to JavaScript language

javascript introduction

It is very important for beginners to have an overview of all the JavaScript language tutorials that they need to master.
This is list of the main components of the JavaScript language and provides a foundation for further use and learning.

Outputs

Methods for displaying results to users, such as console.log(), alert(), document.write().

Variables

Used to store data. Declared using var, let, and const.

Selectors

Ways to select HTML elements for manipulation. For example, document.querySelector(), document.getElementById().

Methods

Functions that are part of objects, such as array.push(), string.toUpperCase().

Functions

Blocks of code that can be invoked with or without parameters, using the function keyword or arrow functions () => {}.

Operators

Symbols that perform operations on values, such as arithmetic (+, -, *, /), relational (==, ===, !=, >, <), and logical (&&, ||, !) operators.

Loops

Used for repeating code, such as for, while, do...while, for...of, for...in.

AJAX (Asynchronous JavaScript and XML)

Technique for asynchronously loading data from a server without refreshing the page, using XMLHttpRequest or the fetch API.

Classes

Blueprints for creating objects, introducing object-oriented programming, using the class keyword.

Objects

Data structures that store collections of properties and methods, e.g., { key: value }.

Events

Actions that a user or the system can perform, such as mouse clicks or key presses. Handling events using addEventListener().

Arrays

Special objects for storing multiple values, e.g., [1, 2, 3].

Promises

Objects representing a future value, used for asynchronous programming, e.g., new Promise(), promise.then(), promise.catch().

JSON (JavaScript Object Notation)

A format for data exchange, easily readable by humans and machines, e.g., JSON.parse(), JSON.stringify().

Scope

The visibility of variables in different parts of the code, e.g., global and local scope.

Closures

Functions that "remember" their lexical scope even when executed outside of it.

Callbacks

Functions passed as arguments to other functions and executed after an operation is completed.

Async/Await

Syntactic sugar for working with promises, allowing asynchronous code to be written as if it were synchronous.

Modules

Mechanisms for organizing and sharing code between different files and applications, using export and import.

Error Handling

Mechanisms for catching and processing errors, e.g., try...catch.







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