Blog & Tutorials

Playcode123.com

Playcode123.com

Code, HTML

HTML Audio and Video for Beginners: Add Players, Captions, and a Transcript

Illustration of a laptop showing a paper-folding video with captions, an audio player, and a transcript icon.

Code, HTML

Make Your First Website Keyboard-Friendly: Build an Accessible Practice Counter

Illustration of a practice counter with its Add practice button highlighted, connected to the Tab, Enter, and Space keys on a keyboard.

Code, CSS

Responsive Web Design for Beginners: Make Your First Website Work on a Phone

Illustration of a desktop website with two cards side by side and a phone showing the same cards stacked vertically.

JAVASCRIPT, Code

Why Is My Code Not Working? Fix Your First HTML, CSS, and JavaScript Bugs

Illustration of a magnifying glass finding a bug in code on a laptop, with a green check mark for a successful fix.

Code, CSS

CSS Box Model for Beginners: Understand Margin, Padding, and Width

CSS box model illustration with content surrounded by padding, a border, and an outer margin.

JAVASCRIPT, Code

JavaScript Conditional Statements: Build a Quiz That Explains Your Answer

JavaScript quiz with if and else branches leading to correct-answer and retry feedback.

Code, CSS

CSS Flexbox for Beginners: Build a Simple Navigation Bar

Light-mode Flexbox navigation displayed in one row on desktop and wrapped into two rows on mobile

Code, HTML

Create a Simple HTML Table: Build a Weekly Coding Plan

Weekly coding plan arranged in an HTML table with weekday columns and coding tasks.

HTML, Code

Using PNG Images in a Webpage: Build and Troubleshoot an Image Card

PNG image card with transparency checkerboard and image-source troubleshooting.

CSS, Code

CSS border-radius and box-shadow: Style a Simple Card

Plain card compared with a card using rounded corners and a soft CSS shadow.

Code, HTML

HTML Details and Mark: Build a Small Troubleshooting Panel

Expandable HTML troubleshooting panel with highlighted text.

JAVASCRIPT, Code

JavaScript Functions for Beginners

JavaScript function transforming input values into an output greeting.

Recommended resource

Web Design with HTML, CSS, JavaScript and jQuery Set

English edition · by Jon Duckett

A visual guide to building websites with HTML, CSS, JavaScript and jQuery.

View on Amazon.nl

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