Making a Browser Based Game With Vanilla JS and CSS – SitePoint

This article demonstrates building a browser-based flag-guessing game using only vanilla JavaScript and CSS, showcasing the power of modern web technologies without external libraries or frameworks. Let's dive into creating this engaging game step-by-step.

Concept:

The game presents a flag emoji and multiple-choice options. Players select a country, receiving feedback and progressing through rounds.

Step 1: Basic Structure

We'll need a list of countries and their flags (using emojis). A simple interface displays the flag and five answer buttons. CSS uses a grid layout for responsive design. The project structure includes an HTML file, a data.json file containing country data, and folders for JavaScript, helper functions, CSS, and images.

Step 2: Simple Prototype

We load data.json using fetch, then start the game. The startGame function randomizes the country list, selects an answer, picks four more countries, and updates the DOM with the flag and answer buttons. The checkAnswer function evaluates player choices, providing feedback. A Fisher-Yates shuffle algorithm randomizes the country order.

Step 3: Modular Code

To improve code organization, we'll use JavaScript modules. The HTML imports step3.js, which imports helper functions (loadCountries and shuffle) from separate files. The game logic is encapsulated within a Game class, enhancing data integrity and maintainability.

Step 4: Scoring and Game Over

The Game constructor now includes numTurns. The DOM is updated to include a score display, a replay button, and a game-over screen. The start method initializes the score and turn counter, and the nextTurn method handles round progression, updating the score and triggering the game-over state when all turns are complete. The gameOver method displays the final score.

Step 5: Animations

CSS animations enhance the user experience. Keyframes create sliding animations for the country list, appearing and disappearing smoothly between turns. The animationend event ensures smooth transitions.

Step 6: Final Touches

A title screen is added to provide context. A player rating system is implemented based on the final score. Animations are added to celebrate correct answers.

Further Enhancements:

The article suggests several improvements:

• Adding sound effects.
• Enabling offline play using web workers.
• Storing game statistics in local storage.
• Adding social media sharing capabilities.

This tutorial effectively demonstrates how to create a functional and engaging game with minimal code, highlighting the capabilities of vanilla JavaScript and CSS. The modular approach and use of CSS animations showcase best practices for modern web development.

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