MineXLauncher/resources/addons/jump-boost.js

let height = 0; let maxJumpHeight = 3; document.addEventListener('keydown', function(event) { if (event.code == 'Space' && ModAPI.mcinstance.$currentScreen === null) { if (height < maxJumpHeight) { ModAPI.mcinstance.$thePlayer.$motionY = 1; height += 1; } else if (ModAPI.mcinstance.$thePlayer.$isCollidedVertically === 1){ height = 0; } } });