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The coffeescript compiler is, for some reason, wrapping all of my .coffee files in a function when they are compiled. For example, if I have test.coffee:
class TestClass
constructor: (@value) ->
printValue: () ->
alert(@value)
printAValue = () ->
test = new TestClass()
test.printValue()
then I get test.js:
(function() {
var TestClass, printAValue;
TestClass = (function() {
function TestClass(value) {
this.value = value;
}
TestClass.prototype.printValue = function() {
return alert(this.value);
};
return TestClass;
})();
printAValue = function() {
var test;
test = new TestClass();
return test.printValue();
};
}).call(this);
My simple html file won't work with this:
<html>
<head>
<script src="test.js"></script>
</head>
<body onload="printAValue()">
</body>
</html>
I haven't worked with much JS before, and I wouldn't doubt the coffee compiler, but is the way it should work? How
222
See my answer here on sharing jS code between files/modules. Also FYI the wrapper function is by design to prevent unintentional global variables. You can disable with by passing --bare to the coffee compiler command line tool, but it is a best practice with good reason.
76
Never add event listeners in HTML. Add them in your JavaScript, preferably in the same scope in which you define the event handler.
printAValue = () ->
test = new TestClass()
test.printValue()
document.body.addEventListener('load', printAValue, false)
If you absolutely need to export something to the global scope, export to the window object:
window.printAValue = () ->
test = new TestClass()
test.printValue()
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