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<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="./styles.css">
<link rel="stylesheet" href="styles.css">
</head>
<body>
<nav id="navbar">
<p><header>JS Documentation</header></p>
<ul>
<li><a class="nav-link" href="#Introduction">Introduction</a></li>
<li><a class="nav-link" href="#What_you_should_already_know">What you should already know</a></li>
<li><a class="nav-link" href="#JavaScript_and_Java">Javascript and Java</a></li>
<li><a class="nav-link" href="#Hello_world">Hello world</a></li>
<li><a class="nav-link" href="#Variables">Variables</a></li>
</ul>
</nav>
<main id="main-doc">
<section class="main-section" id="Introduction">
<header>Introduction</header>
<p>JavaScript is a cross-platform, object-oriented scripting language.</p>
<p> It is a small and lightweight language. Inside a host environment (for example, a web browser), JavaScript can be connected to the objects of its environment to provide programmatic control over them.</p>
<p>Core JavaScript can be extended for a variety of purposes by supplementing it with additional objects; for example:</p>
<ul style="list-style-type:disc;">
<li>Client-side JavaScript extends the core language by supplying objects to control a browser and its Document Object Model (DOM).</li>
<li>Server-side JavaScript extends the core language by supplying objects relevant to running JavaScript on a server.</li>
</section>
<section class="main-section" id="What_you_should_already_know">
<header>What you should already know</header>
<p>This guide assumes you have the following basic background:
<ul style="list-style-type:disc;">
<li>A general understanding of the Internet and the World Wide Web (WWW).</li>
<li>Good working knowledge of HyperText Markup Language (HTML).</li>
<li>Some programming experience. If you are new to programming, try one of the tutorials linked on the main page about JavaScript.</li>
</section>
<section class="main-section" id="Javascript_and_Java">
<header>Javascript and Java</header>
<p>JavaScript and Java are similar in some ways but fundamentally different in some others. The JavaScript language resembles Java but does not have Java's static typing and strong type checking.</p>
<p>JavaScript follows most Java expression syntax, naming conventions and basic control-flow constructs which was the reason why it was renamed from LiveScript to JavaScript.</p>
</section>
<section class="main-section" id="Hello_world">
<header>Hello world</header>
<p>To get started with writing JavaScript, open the Scratchpad and write your first "Hello world" JavaScript code:</p>
<code>function greetMe(yourName) { alert("Hello " + yourName); }
greetMe("World");</code>
</section>
<section class="main-section" id="Variables">
<header>Variables</header>
<p>You use variables as symbolic names for values in your application. The names of variables, called identifiers, conform to certain rules.</p>
<p>A JavaScript identifier must start with a letter, underscore (_), or dollar sign ($); subsequent characters can also be digits (0-9).</p>
<p>You can declare a variable in three ways:</p>
<p><code>var x = 42.</code></p>
<p><code>x = 42.</code></p>
<p><code>let y = 13.</code></p>
<p>For example the following code will log 5, because the scope of x is the function (or global context) within which x is declared, not the block, which in this case is an if statement.</p>
<code>if (true) { var x = 5; } console.log(x); // 5</code>
</section>
/* file: styles.css */
@media (max-width: 600px) {
body {
background-color: lightblue;
}
}
header{font-weight: bold;}
body{display: flex;
flex-direction: row;
line-height: 1.5;}
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