JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.jsdelivr.net/npm/[email protected]/build/three.min.js"></script>

CSS

body {
	  margin: 0;
}

JavaScript

let camera, scene, renderer, mesh, clock;

let speed = 1;
const direction = new THREE.Vector3( 1, 0, 0 );
const velocity = new THREE.Vector3();
const displacement = new THREE.Vector3();

init();
animate();

function init() {

    camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 10 );
    camera.position.z = 4;

    scene = new THREE.Scene();
    
    clock = new THREE.Clock();

    const geometry = new THREE.ConeGeometry( 0.2 );
    geometry.rotateX( Math.PI * 0.5 );
    const material = new THREE.MeshNormalMaterial();

    mesh = new THREE.Mesh( geometry, material );
    mesh.lookAt( direction );
    scene.add( mesh );

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setPixelRatio( window.devicePixelRatio );
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );

}

function animate() {

    requestAnimationFrame( animate );
    
    const delta = clock.getDelta();
    
    speed -= 0.2 * delta;
    
    speed = Math.max( speed, 0 ); // prevent negative speed
    
    velocity.copy( direction ).multiplyScalar( speed );
    displacement.copy( velocity ).multiplyScalar( delta );
    mesh.position.add( displacement );

    renderer.render( scene, camera );

}