What can html, css and javascript do

Question

Basically i want to program like morse code calculator or normal calculators and games, is that possible with html, css and javascript

Answer 1

This program has mors code functions. But for games are better C# and unity engine or GDscript and Godot engine.

Answer 2

HTML5 (GDevelop)
GDevelop is a 2D and 3D cross-platform, free and open-source game engine, which mainly focuses on creating PC and mobile games, as well as HTML5 games playable in the browser.
https://html5gamedevelopment.com/

Phaser JS game engine (Phaser 3 and Phaser 4) 2D games
PhaserJS is a popular open-source JavaScript framework for creating 2D games that run directly in the browser. It uses WebGL or Canvas (depending on browser support) and makes it easy to build both arcade, platform, and puzzle games, as well as more complex projects with physics, scenes, and a resource management system.
https://phaser.io

Without PL

Copper Cube 6 - is a full-featured 3D game engine.No programming needed(& JavaScript for advanced). Create 3D games and apps quickly. Includes terrain editor,low poly modelling tools, 3D models, precreated game AI, effects and more.
https://www.ambiera.com/coppercube/

GameMaker (only 2D, without programming language)
https://gamemaker.io