I have a function myModule.myFunction in a larger external script mymodule.js that is executed on load. Everything seems to work fine. But now I have added
"use strict";
at the top of the external script. And I get a
TypeError: MyModule is undefined
and the page stops working. So I am wondering where I did something problematic. Here is the structure of my page (unfortunately, I did not manage to produce a minimal example):
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<!-- Some html here -->
<script src="mymodule.js"></script>
<script>
function myOnload() {
myModule.myFunction();
}
window.addEventListener('load', myOnload, false);
</script>
</body>
</html>
Here is what the MyModule in mymodule.js looks like:
var myModule = (function(){
// stuff
})();
In
myModule.jsyou need to explicitly assignmyModuleto thewindowobject (when using "use strict").Change it to
window.myModule = ...Reason: in sloppy mode, undeclared variables are automatically added as properties on the global object. In strict mode they are not )to avoid accidental interference).