beginners-step-by-step-coding-course-learn-computer-programming-the-easy-way

Page 214

Build a better website A well-built website should be easy to read and navigate through. It should be programmed to allow the largest-possible number of clients to view it, and should be thoroughly indexed by search engines to draw traffic to the site. Accessibility Not all clients are web browsers. An HTML document might also be read on a device that converts text into braille for the blind, or reads the text out loud for people with a hearing disability. An HTML document can be programmed to ensure that it is correctly rendered by

Readable content Ensure there is enough contrast between the background and the text colour to make the content easy to read. A dark coloured font will be easier to read on a light background, and vice versa.

these alternative clients. This requires including additional attributes in the HTML tags (see pp.210–11) and adding alternative methods of navigating the site to ensure that it can be accessed by users with special needs. Programmers should think about the topics mentioned below to improve the accessibility of their website.

Travel Home http://www.traveltheworld.com/home

Travel Flights

Hotels

Cabs

HELLO WORLD!

Content organization The content of a website should be arranged in a logical and intuitive way. There should be buttons and hyperlinks to suggest the next page the user should visit on their journey through the site. Breadcrumb links show the user where they are in the context of the site and allow them to go back to a previous page if necessary.

From

To

Departure

Return

Search

Beach resorts

Historical monuments

Keyboard alternatives Some users may prefer using a keyboard rather than a mouse, so websites should provide for keyboard alternatives for actions, such as scrolling, that usually rely on a mouse. Text alternatives Non-browser clients require text alternatives for non-text items. Include an “alt” attribute in an <img/> tag to ensure that such clients can display a text value if they cannot display images.

Describes the image in text

<img src="image.jpg" alt="Eiffel Tower"/>


Turn static files into dynamic content formats.

Create a flipbook

Articles inside

Other programming languages

5min
pages 344-347

PROJECT: Responsive website

52min
pages 304-343

ACKNOWLEDGMENTS

1min
page 360

INDEX

26min
pages 352-359

GLOSSARY

16min
pages 348-351

Graphic user interfaces

2min
pages 286-287

Libraries and frameworks

2min
pages 284-285

Object-oriented JavaScript

2min
pages 282-283

JavaScript debugging

3min
pages 280-281

Functions in JavaScript

2min
pages 278-279

Input and output

3min
pages 272-273

Loops in JavaScript

5min
pages 274-277

Logic and branching

2min
pages 270-271

Variables and data types

6min
pages 266-269

PROJECT: Styling the web

29min
pages 242-263

Code editors

4min
pages 208-209

Build a better website

4min
pages 214-215

Responsive layouts

2min
pages 240-241

HTML forms and hyperlinks

3min
pages 212-213

How the Web works

3min
pages 206-207

Exploring basic HTML

4min
pages 210-211

Pygame Zero

2min
pages 176-177

PROJECT: Budget manager

20min
pages 158-175

Logic operators and branching

3min
pages 104-105

Objects and classes

2min
pages 156-157

PROJECT: Team allocator

14min
pages 118-129

Libraries

3min
pages 116-117

What is Python?

3min
pages 94-95

Loops in Python

5min
pages 108-111

Installing Python

3min
pages 96-97

Using functions

3min
pages 50-51

Sending messages

3min
pages 48-49

Input

3min
pages 46-47

Logic and decisions

3min
pages 44-45

Managing program flow

4min
pages 40-41

Manipulating data

3min
pages 42-43

Output using movement

4min
pages 36-37

Output using looks and sounds

4min
pages 38-39

Coloured blocks and scripts

3min
pages 34-35

FOREWORD

2min
pages 10-11

What is programming?

3min
pages 16-17

Programming languages

6min
pages 22-27

What is Scratch?

2min
pages 28-29

About this book

3min
pages 12-15

Working as a software developer

2min
pages 20-21

Coding in the real world

1min
pages 18-19
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