How to call a TypeScript function in an HTML file?

I have a TypeScript file named listeners.ts that defines event listeners like this:

export function TimeField_OnChange () {
  // ...
}

There is an index.html in which I want to use this function like this (which doesn't work):

document.getElementById("timeFieldCheckBox").addEventListener("change", TimeField_OnChange);

The browsers JavaScript engine cannot find the function. How do I reference it correctly?