为什么会出现错误“未捕获的TypeError:未定义不是函数"? [英] Why is there an error, "Uncaught TypeError: undefined is not a function"?
本文介绍了为什么会出现错误“未捕获的TypeError:未定义不是函数"?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我寻找了不匹配的花括号，但仍然无法弄清为什么错误显示在HTML:lab3.init($('#viewport'));这一行.
I looked for mismatched braces, but still not able to figure out why the error shows for the line: lab3.init($('#viewport')); in the HTML.
HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>Graphics Lab</title>
<script src="js/graphics.js"></script>
<!-- Bootstrap core CSS -->
<link href="/css/bootstrap.min.css" rel="stylesheet">
<style>
.starter-template {
padding: 40px 15px;
text-align: center;
}
#viewport {
height: 500px;
width: 600px;
background: white;
margin: 0px auto;
}
#viewport-container {
}
</style>
<script src="http://code.jquery.com/jquery-2.1.0.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r61/three.js"></script>
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Lab 3</a>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
<div class="container">
<div class="starter-template">
<h1>Graphics</h1>
<p class="lead">This is my 3d Graphics scene</p>
<div id="viewport-container" class="well">
<div id="viewport">
</div>
</div>
</div>
<script>
//initialize the viewport
lab3.init($('#viewport'));
</script>
</div><!-- /.container -->
</body>
</html>
JavaScript:
(function ( lab3 , $, undefined) {
lab3.init = function(hook) {
var WIDTH = 600,
HEIGHT = 500;
var renderer = new THREE.WebGLRenderer();
renderer.setSize(WIDTH, HEIGHT);
hook.append(renderer.domElement);
var scene = new THREE.Scene();
var pointLight =
new THREE.PointLight(0xFFFFFF);
pointLight.position = new THREE.Vector3(-10, 100, 100);
scene.add(pointLight);
var VIEW_ANGLE = 65, //65 FOV is most 'natural' FOV
ASPECT = WIDTH / HEIGHT,
NEAR = 0.1, //these elements are needed for cameras to
FAR = 10000; //partition space correctly
var camera =
new THREE.PerspectiveCamera(
VIEW_ANGLE,
ASPECT,
NEAR,
FAR);
camera.position.z = 300;
scene.add(camera);
var material =
new THREE.MeshLambertMaterial(
{
color: 0x00bbcc
});
var cube = new THREE.Mesh(
new THREE.CubeGeometry(
40, 55, 30),
material);
scene.add(cube);
function renderLoop() {
renderer.render(scene, camera);
window.requestAnimationFrame(renderLoop);
}
window.requestAnimationFrame(renderLoop);
}
})(window.lab3 = window.lab3 || {} , jQuery)
推荐答案
包含脚本的顺序.
<script src="http://code.jquery.com/jquery-2.1.0.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r61/three.js"></script>
<script src="js/graphics.js"></script>
应该始终将jQuery包含在内.
如果您的JS引用了插件或库，则引用的插件或库应包含在其中.
这篇关于为什么会出现错误“未捕获的TypeError:未定义不是函数"?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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