PDF.js Express Custom annotations

Hello Logan,
I was trying the “createSignHereElement” code snippet. I copied it on one of the index.js files, but i dont see the “SignHere” element on my page. Am I missing something?

Code:
const createSignHereElement = Annotations.SignatureWidgetAnnotation.prototype.createSignHereElement;

Annotations.SignatureWidgetAnnotation.prototype.createSignHereElement = () => {
// signHereElement is the default one with dark blue background
const signHereElement = createSignHereElement.apply(this, arguments);

signHereElement.style.background = ‘red’;
return signHereElement;
}