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REFERENCEjavascript

javascript Documentation

📖 INDEX

# Accesability-Semantic-HTML

# Anonymous-Functions

# Arguments-Parameters

# Array-Destructuring

# Array-Methods

# Arrow-Functions

# Callback-Functions

# Core-Technologies-Advance-Knowledge

# Creating-Arrays

# Custom-Exceptions

# Debounce-Throttle

# Delete-Elements

# Destructuring

# Dev-Methodologies

# Element-Selection

# Elements-Access

# Elements-creation

# Elements-Manipulation

# Error-Objects

# Event-Listeners

# Export-by-Default

# finallyJavaScript

# Function-Declaration

# Function-Expressions

# Import-Export

# InheritanceJavaScript

# JavaScript-Advance-Functions

# JavaScript-Array-Object

# JavaScript-Arrays-Loops

# JavaScript-Async-Intro

# JavaScript-Async

# JavaScript-Basic-Syntax

# JavaScript-BOM

# JavaScript-Callbacks

# JavaScript-ClientvsServer

# JavaScript-Clousures

# JavaScript-Comments

# JavaScript-Common-Events

# JavaScript-Common-Methods

# JavaScript-Condicionals

# JavaScript-Console

# JavaScript-Control-Structure

# JavaScript-Data-types-Variables

# JavaScript-Dates-Time

# JavaScript-Dates

# JavaScript-Debugging-Tools

# JavaScript-Declaration

# JavaScript-DOM

# JavaScript-Embedded

# JavaScript-Errors-Intro

# JavaScript-Errors

# JavaScript-Event-Listener

# JavaScript-Events

# JavaScript-Export

# JavaScript-Fetch-API

# JavaScript-First-Steps

# JavaScript-Functions

# JavaScript-History

# JavaScript-How-works

# JavaScript-Inheritance

# JavaScript-Intro

# JavaScript-JSON-Works

# JavaScript-JSON

# JavaScript-Localstorage

# JavaScript-Loops

# JavaScript-Manipulation

# JavaScript-Modular

# JavaScript-Modules

# JavaScript-Objects

# JavaScript-Operators

# JavaScript-POO

# JavaScript-Promises

# JavaScript-Propagation

# JavaScript-Prototypes

# JavaScript-Redirects

# JavaScript-Return

# JavaScript-Scope

# JavaScript-Script

# JavaScript-Sets

# JavaScript-Storage

# JavaScript-Style-Modification

# JavaScript-Window-Location

# Logic-Operators

# Memory Management

# Modern-Libreries-Frameworks

# Modification-Methods

# Modify-Attributes

# Object-Creating

# Optimization-and-Build

# Problem-solving

# Recursive-Function

# Rest-Parameters

# Scope-Context

# Spread Operator

# State-Management

# Team-Work-and-Communication

# Template Literals

# this-JavaScript

# Version-Control

# What-is-JavaScript

# Recursive-Functions

# Array-Creation

# Selection-Methods-Alias

# Custom-Exceptions-Alias

# Scope-and-Context

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JS Element Access

Learn to capture and manipulate DOM elements with modern JavaScript.

element_access.js

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Exploring the DOM...

Tutor: To access elements in the DOM, we use the 'document' object. The fastest method is getElementById().

Key Concepts

getElementById()

Searches for a unique element through its ID attribute. It is the most efficient method.

querySelector()

Uses CSS selectors. Returns the first matching element.

querySelectorAll()

Returns a NodeList (similar to an array) with all matching elements.

Code Mission

Write the code to get an element with the id "btn-save":

Tip: Check the parentheses and quotes.

Access Glossary

NodeList: Collection of nodes returned by querySelectorAll. Can be iterated with .forEach().
Live Collection: Collections (like those from getElementsByTagName) that automatically update if the DOM changes.
HTMLElement: The type of object that represents an HTML element in JavaScript.

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