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HTMLmarkup~5 mins

How browsers read HTML

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Introduction

Browsers read HTML to show web pages correctly. Understanding this helps you write better code that works everywhere.

When you want to create a webpage that people can see in their browser.
When you want to fix problems with how a webpage looks or works.
When you want to make sure your webpage loads fast and correctly.
When you want to add new features or content to your website.
When you want to understand why some parts of your webpage don't show as expected.
Syntax
HTML
Browsers read HTML from top to bottom, line by line.
They look for tags like <html>, <head>, <body>, and others.
They build a structure called the DOM (Document Object Model) to show the page.
Browsers ignore spaces and line breaks unless inside certain tags like 
.
If HTML has mistakes, browsers try to fix them to show the page anyway.
Examples
This is a simple HTML page. The browser reads the <head> first, then the <body> to show content.
HTML
<!DOCTYPE html>
<html lang="en">
<head>
  <title>My Page</title>
</head>
<body>
  <h1>Hello!</h1>
  <p>Welcome to my website.</p>
</body>
</html>
The browser reads each paragraph tag in order and shows them one after another.
HTML
<html>
  <body>
    <p>First paragraph.</p>
    <p>Second paragraph.</p>
  </body>
</html>
Sample Program

This page shows a heading and two paragraphs. The browser reads the code from top to bottom and displays the content in order.

HTML
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Browser Reading HTML</title>
</head>
<body>
  <h1>How Browsers Read HTML</h1>
  <p>Browsers read HTML from top to bottom.</p>
  <p>They build a structure to display the page.</p>
</body>
</html>
OutputSuccess
Important Notes

Browsers create the page structure called the DOM to manage content and styles.

Even if HTML has small errors, browsers try to fix them so the page still shows.

Understanding this helps you write clean and working HTML code.

Summary

Browsers read HTML code from top to bottom, line by line.

They look for tags and build a structure to show the page.

Knowing this helps you create webpages that display correctly.