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+---
+title: Guia de JavaScript
+slug: Web/JavaScript/Guia
+tags:
+  - Guía
+  - JavaScript
+  - 'l10n:prioridade'
+translation_of: Web/JavaScript/Guide
+---
+<div>{{jsSidebar("JavaScript Guide")}}</div>
+
+<p class="summary">The JavaScript Guide shows you how to use <a href="/en-US/docs/Web/JavaScript">JavaScript</a> and gives an overview of the language. If you want to get started with JavaScript or programming in general, consult the articles in the <a href="/en-US/Learn">learning area</a>. If you need exhaustive information about a language feature, have a look at the <a href="/en-US/docs/Web/JavaScript/Reference">JavaScript reference</a>.</p>
+
+<h2 id="Capítulos">Capítulos</h2>
+
+<p>This Guide is divided into several chapters:</p>
+
+<ul class="card-grid">
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Introduction">Introdução</a></span>
+
+  <p><a href="/pt-PT/docs/Web/JavaScript/Guia/Introdução">About this guide</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Introduction#What_is_JavaScript">About JavaScript</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Introduction#JavaScript_and_Java">JavaScript and Java</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Introduction#JavaScript_and_the_ECMAScript_Specification">ECMAScript</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Introduction#Getting_started_with_JavaScript">Tools</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Introduction#Hello_world">Hello World</a></p>
+ </li>
+ <li><span><a href="/pt-PT/docs/Web/JavaScript/Guia/Gramática_e_tipos">Gramática e tipos</a></span>
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Basics">Basic syntax &amp; comments</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Declarations">Declarations</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Variable_scope">Variable scope</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Variable_hoisting">Variable hoisting</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Data_structures_and_types">Data structures and types</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Literals">Literals</a></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling">Controlo de fluxo e manipulação de erros</a></span>
+  <p><code><a href="/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling#if...else_statement">if...else</a></code><br>
+   <code><a href="/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling#switch_statement">switch</a></code><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling#Exception_handling_statements"><code>try</code>/<code>catch</code>/<code>throw</code></a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling#Utilizing_Error_objects">Error objects</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling#Promises">Promises</a></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration">Loops e iteração</a></span>
+  <p><code><a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#for_statement">for</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#while_statement">while</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#do...while_statement">do...while</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#break_statement">break</a>/<a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#continue_statement">continue</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#for...in_statement">for..in</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration#for...of_statement">for..of</a></code></p>
+ </li>
+</ul>
+
+<ul class="card-grid">
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Functions">Funções</a></span>
+
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Functions#Defining_functions">Defining functions</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Functions#Calling_functions">Calling functions</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Functions#Function_scope">Function scope</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Functions#Closures">Closures</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Functions#Using_the_arguments_object">Arguments</a> &amp; <a href="/en-US/docs/Web/JavaScript/Guide/Functions#Function_parameters">parameters</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Functions#Arrow_functions">Arrow functions</a></p>
+ </li>
+ <li><span><a href="/pt-PT/docs/Web/JavaScript/Guia/Guia_expressões_e_operadores">Expressões e operadores</a></span>
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Assignment_operators">Assignment</a> &amp; <a href="/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Comparison_operators">Comparisons</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Arithmetic_operators">Arithmetic operators</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Bitwise_operators">Bitwise</a> &amp; <a href="/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Logical_operators">logical operators</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Conditional_(ternary)_operator">Conditional (ternary) operator</a></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates">Números e datas</a></span><a href="/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates#Numbers"> Number literals</a>
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates#Number_object"><code>Number</code> object</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates#Math_object"><code>Math</code> object</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates#Date_object"><code>Date</code> object</a></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Text_formatting">Formatação de texto</a></span>
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Text_formatting#String_literals">String literals</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Text_formatting#String_objects"><code>String</code> object</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Text_formatting#Multi-line_template_literals">Template literals</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Text_formatting#Internationalization">Internationalization</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Regular_Expressions">Regular Expressions</a></p>
+ </li>
+</ul>
+
+<ul class="card-grid">
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Indexed_collections">Coleções indexadas</a></span>
+
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Indexed_collections#Array_object">Arrays</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Indexed_collections#Typed_Arrays">Typed arrays</a></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Keyed_collections">Coleções Keyed</a></span>
+  <p><code><a href="/en-US/docs/Web/JavaScript/Guide/Keyed_collections#Map_object">Map</a></code><br>
+   <code><a href="/en-US/docs/Web/JavaScript/Guide/Keyed_collections#WeakMap_object">WeakMap</a></code><br>
+   <code><a href="/en-US/docs/Web/JavaScript/Guide/Keyed_collections#Set_object">Set</a></code><br>
+   <code><a href="/en-US/docs/Web/JavaScript/Guide/Keyed_collections#WeakSet_object">WeakSet</a></code></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects">Trabalhar com  objetos</a></span>
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Objects_and_properties">Objets e propriedades</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Creating_new_objects">Criação de objetos</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Defining_methods">Definição de métodos</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Defining_getters_and_setters">Getter and setter</a></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Details_of_the_Object_Model">Detalhes do modelo de objeto</a></span>
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Details_of_the_Object_Model#Class-based_vs._prototype-based_languages">Prototype-based OOP</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Details_of_the_Object_Model#Creating_the_hierarchy">Creating object hierarchies</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Details_of_the_Object_Model#Property_inheritance_revisited">Inheritance</a></p>
+ </li>
+</ul>
+
+<ul class="card-grid">
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators">Iterators e geradores</a></span>
+
+  <p><a href="/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators#Iterators">Iterators</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators#Iterables">Iterables</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators#Generators">Generators</a></p>
+ </li>
+ <li><span><a href="/en-US/docs/Web/JavaScript/Guide/Meta_programming">Metadados de programação</a></span>
+  <p><code><a href="/en-US/docs/Web/JavaScript/Guide/Meta_programming#Proxies">Proxy</a></code><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Meta_programming#Handlers_and_traps">Handlers and traps</a><br>
+   <a href="/en-US/docs/Web/JavaScript/Guide/Meta_programming#Revocable_Proxy">Revocable Proxy</a><br>
+   <code><a href="/en-US/docs/Web/JavaScript/Guide/Meta_programming#Reflection">Reflect</a></code></p>
+ </li>
+</ul>
+
+<p>{{Next("Web/JavaScript/Guide/Introduction")}}</p>