Feature Engineering

Tutorial 2 of 4

1. Introduction

Goal of the tutorial

The goal of this tutorial is to introduce you to the concept of feature engineering in the context of web development using HTML. We will focus on enhancing your webpage by adding new elements and attributes.

What you will learn

By the end of this tutorial, you should be able to:
- Understand the importance of feature engineering in HTML
- Implement different HTML elements and attributes
- Improve the functionality of your webpage through feature engineering

Prerequisites

Basic knowledge of HTML and CSS is required. Familiarity with JavaScript can be advantageous.

2. Step-by-Step Guide

Feature engineering in HTML involves creating new elements and attributes to provide more functionality or improve the user experience on your webpage.

HTML Elements

An HTML element usually consists of a start tag and end tag, with the content inserted in between.

Example:

<p>This is a paragraph.</p>

Attributes

Attributes provide additional information about an element. They are always specified in the start tag.

Example:

<a href="https://www.example.com">This is a link</a>

In this example, href is an attribute of the a element.

3. Code Examples

Example 1: Creating a Navigation Bar

A navigation bar is a crucial feature for any website. It helps users navigate through the website.

Code snippet:

<!--This is a simple navigation bar-->
<div id="navbar">
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</div>

In this code, div is a container for the navigation bar, and a elements are used for different sections of the website. The href attribute is used to link to these sections.

Example 2: Creating a Form

Forms are vital for gathering user input.

Code snippet:

<!--This is a simple form-->
<form action="/submit_form">
  <label for="fname">First name:</label><br>
  <input type="text" id="fname" name="fname"><br>
  <label for="lname">Last name:</label><br>
  <input type="text" id="lname" name="lname">
  <input type="submit" value="Submit">
</form>

In this code, form is a container for the input fields. The label element defines a label for many form elements. The input element is used for input fields. The type attribute defines the input type, and the name attribute defines the name for the input.

4. Summary

In this tutorial, we've covered feature engineering in HTML, which involves creating new elements and attributes to enhance a webpage. We've also looked at how to implement a navigation bar and a form.

5. Practice Exercises

Create an HTML page with a navigation bar, a form, and a button which, when clicked, displays an alert message.
Create an HTML page with a table of contents that links to different sections of the page.

Solutions:

Code snippet:

<!DOCTYPE html>
<html>
<body>

<!--Navigation bar-->
<div id="navbar">
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</div>

<!--Form-->
<form action="/submit_form">
  <label for="fname">First name:</label><br>
  <input type="text" id="fname" name="fname"><br>
  <label for="lname">Last name:</label><br>
  <input type="text" id="lname" name="lname">
  <input type="submit" value="Submit">
</form>

<!--Button-->
<button onclick="alert('Button clicked!')">Click me</button>

</body>
</html>

Code snippet:

<!DOCTYPE html>
<html>
<body>

<!--Table of Contents-->
<div id="toc">
  <a href="#section1">Section 1</a>
  <a href="#section2">Section 2</a>
</div>

<!--Section 1-->
<h2 id="section1">Section 1</h2>
<p>This is Section 1.</p>

<!--Section 2-->
<h2 id="section2">Section 2</h2>
<p>This is Section 2.</p>

</body>
</html>

In the first exercise, an onclick event is used to trigger an alert when the button is clicked. In the second exercise, different sections are linked via the table of contents.