javascript-notes/JS-BOM-Introduction.html at master · hamzalodhi2023/javascript-notes · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
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    <title>JS BOM Introduction</title>
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  </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&nbsp;<code>window</code>&nbsp;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>