Hi there,
I've got extensive experience with live DOM manipulation using JS. I can get this done for you using a framework called VUE.js which is similar to Angular but is much more cutting edge and provides a simple solution to complex front-end problems. Vue works by binding front-end elements to data within Javascript code. For example, imagine I had a variable "A" which contained the following text: "Hello world". I could then bind a form element to this data so that when the contents of "A" is changed, it will be reflected automatically within the form. Check out my profile to see some of my previous work. I'd also like to ask, what are your hosting arrangements? And is this a Wordpress site?
Thanks, hope to hear from you soon.