undefined.js

var signaturePads = [];

var signaturePadContainer =  document.getElementsByClassName('signature-container');
var signaturePadParentClass = document.getElementsByClassName('signature-pad');

console.log(signaturePadContainer)
console.log(signaturePadParentClass)

var signaturePadParentIndex = signaturePadContainer.signaturePadParentClass;

// console.log( signaturePadParentIndex)

var signaturePadParentData =  signaturePadParentClass.dataset.parent;