How to Insert JSON Data into Text Area

I am currently in a node, angular, express, html environment. I have numerous buttons that I use to fill this text area with text data.

<div class="form-group">
 <label class="control-label" for="flyer description">Description</label>
  <textarea style="height:400px" class="form-control" id="flyer-description"></textarea>
</div>

Here is my button: <td><button id="button1">Client Welcome</button></td> Here is a snippet of JS corresponding to this button:

$(function() {
$('#button1').on('click', function() {
$('#flyer-description').load("/assets/clientwelcome.txt");
 });
  });

Now, while I import text, I would like to import JSON data so that when the text calls for say {{client.name}}, with the presence of ClientCtrl(Angular Controller) and my module it will change to the specific client's name. Does anyone have any suggestions?