[英]Uncaught TypeError: undefined is not a function
Button.js: Button.js:
(function () {
function Button(label) {
console.log(label);
}
}());
demo.html: demo.html:
<html>
<head>
<script src="../../lib/easeljs-0.7.1.min.js"></script>
<script src="Button.js"></script>
<script>
window.onload = function() {
var canvas, stage, button;
canvas = document.getElementById("canvas");
stage = new createjs.Stage(canvas);
button = new createjs.Button("Anything");
stage.addChild(button);
stage.update();
}
</script>
</head>
<body>
<canvas id="canvas" width=200 height=200>Canvas is not supported</canvas>
</body>
</html>
for the line button = new createjs.Button("Anything"); 对于行button = new createjs.Button(“ Anything”); Error: Uncaught TypeError: undefined is not a function Why i am getting this error? 错误:未捕获TypeError:未定义不是函数为什么我收到此错误?
It is because the Button
is not in a global scope or window
. 这是因为Button
不在全局范围或window
。
You don't need IEFE here. 您在这里不需要IEFE。 Remove it: 去掉它:
function Button(label) {
console.log(label);
}
If you want it with IEFE, then do this: 如果要使用IEFE,请执行以下操作:
$(function () {
window.Button = function (label) {
console.log(label);
}
});
If you want to access Button
by using createjs.Button
, then you must create Button
on the createjs
object: 如果要使用createjs.Button
访问Button
,则必须在createjs
对象上创建Button
:
createjs.Button = function(label){
console.log(label);
};
The above will work in any scope, including the global and your function expression, because createjs
is in the global scope. 上面的代码可以在任何范围内工作,包括全局和函数表达式,因为createjs
在全局范围内。 Now you can do: 现在您可以执行以下操作:
button = new createjs.Button("Anything");
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