jump-and-game-loop

To add jump physics to a JavaScript web game, implement a simple vertical velocity (vy) and vertical position (y) state, update them in a requestAnimationFrame loop, and apply a ground check to prevent double-jumps.

The best way to prevent double-jumping in a JavaScript game loop is to add a ground check that clamps the player's landing position and restricts jump input until the player is safely back on the ground.

requestAnimationFrame works for smooth rendering in a dino game by continuously calling a frame loop function that updates player position and gravity state, ensuring reliable input handling and movement synchronization with the browser's refresh rate.

Yes, you can implement a minimal game loop with gravity in a single-file main.js workflow by maintaining a lightweight requestAnimationFrame loop that tracks vy and y state, requiring no external dependencies.

Your character keeps falling through the ground because the game loop lacks a landing clamp and ground check, which are necessary to stop gravity accumulation and reset the vertical velocity when the player reaches the floor.

No, you do not need a physics engine to add simple jump mechanics; a minimal pattern using basic vy and y state variables within a requestAnimationFrame loop provides reliable player input and movement without overengineering.