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JS-BOM-Introduction.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>JS BOM Introduction</title>
<style>
* {
font-family: Arial, Helvetica, sans-serif;
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</style>
</head>
<body>
<hr />
<h3>Browser Object Model</h3>
The Browser Object Model (BOM) is used to interact with the browser. The
default object of browser is window means you can call all the functions of
window by specifying window or directly. For example: window.alert("hello
javatpoint"); is same as: alert("hello javatpoint"); You can use a lot of
properties (other objects) defined underneath the window object like
document, history, screen, navigator, location, innerHeight, innerWidth.
<h3>
<br />
The Window Object
</h3>
<p>
The <code>window</code> object is supported by all browsers. It
represents the browser's window.
</p>
<p>
All global JavaScript objects, functions, and variables automatically
become members of the window object.
</p>
<p>Global variables are properties of the window object.</p>
<p>Global functions are methods of the window object.</p>
<p>
Even the document object (of the HTML DOM) is a property of the window
object:
</p>
<pre
class="language-javascript"
tabindex="0"
><code class="language-javascript">window<span class="token punctuation">.</span>document<span class="token punctuation">.</span><span class="token function">getElementById</span><span class="token punctuation">(</span><span class="token string">"header"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<p>is the same as:</p>
<pre
class="language-javascript"
tabindex="0"
><code class="language-javascript">document<span class="token punctuation">.</span><span class="token function">getElementById</span><span class="token punctuation">(</span><span class="token string">"header"</span><span class="token punctuation">)</span><span class="token punctuation">;</span></code></pre>
<hr />
</body>
</html>