HTML 没有呈现我的基本 three.js 代码

Question

我对 three.js 和 html 有点菜鸟，但我创建了其他 js 文件，它们可以很好地导入 html 页面，但我很困惑为什么我的基本盒装面食代码没有显示在页面上。在 html 中编写所有脚本时它工作正常，但在同一文件夹中导入 js 文件时却不行。你们能帮我了解发生了什么事吗？

index.js

/*import * as THREE from 'three'
const canvas=document.querySelector('.webgl')
const scene = new THREE.Scene();
const geo = new THREE.BoxGeometry(1,1,1)
const mats = new THREE.MeshBasicMaterial({
  color:'red'
})
const boxmesh=new THREE.Mesh(geo,mats)
scene.add(boxmesh)

const camera = new THREE.PerspectiveCamera(75,window.innerWidth/window.innerHeight,0.1,100)
camera.position.set(0,1,2)
scene.add(camera)
const renderer=new THREE.WebGL1Renderer({
  canvas:canvas
})
renderer.setSize(window.innerWidth,window.innerHeight)
renderer.setPixelRatio(Math.min(window.devicePixelRatio,2))
renderer.shadowMap.enabled=true
renderer.gammaOutput=true
renderer.render(scene, camera)*/
import * as THREE from 'three';

// init

const camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 10 );
camera.position.z = 1;

const scene = new THREE.Scene();
scene.background= new THREE.Color('black')

const geometry = new THREE.BoxGeometry( 0.2, 0.2, 0.2 );
const material = new THREE.MeshNormalMaterial();

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

const renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( animation );
document.body.appendChild( renderer.domElement );

// animation

function animation( time ) {

    mesh.rotation.x = .1;
    mesh.rotation.y = .1;

    renderer.render( scene, camera );

}
animation()

index.html

<!DOCTYPE html>
<html>
    <head>
        <meta name="learning html" content="This is learing making websites">
        <title>Learing GLTF</title>
        <script src="index.js"></script>
    </head>
    <body>
        <canvas class="webgl"></canvas>
        ?
    </body>
</html>

Answer 1

使用最新版本的 three.js（例如 r140）时，在 HTML 中定义导入映射很重要。否则 import import * as THREE from 'three'; 不起作用。需要导入映射，以便可以在浏览器中解析裸模块说明符 three。要进行测试，请尝试使用：

<script type="importmap">
    {
        "imports": {
            "three": "https://unpkg.com/three@0.140/build/three.module.js"
        }
    }
</script>

HTML 没有呈现我的基本 three.js 代码

HTML not rendering my basic three.js code

html

javascript

three.js