title: Text from button to TextArea Javascript
body: <p>So i have a button which sets the value of a textBox. My problem is that i want this text to be added , not to be set, so i can keep pressing the button while the already written text is not erased. </p>
  
  <pre><code>contents: [
          {
              id: 'something',
              elements: [
                  {
                      id: 'something2',
                      type: 'textarea', }
  
  
  
                   {   id: 'testbutton',
                      type: 'button',
                      button: 'button',
                      label: 'Button1',
  
                      onClick: function() {
                      this._.dialog.setValueOf("something","something2","Text was set ");
                      }
  
                  },]
  </code></pre>