title: knockout.js using keywords "this" and "that"
body: <p>I am new and learning knockout libraries. I have two questions.</p>
  
  <p>1) What is the difference between the terms this and that.
  2) What does this.view and that.view mean.</p>
  
  <p>I am mainly asking this question because I am using highcharts and renderTo is set to that.view, when I assign it to a div tag it works well upon first time load, if that chart needs to be loaded again, it div tag value doesn't display the chart. However it displays it everytime with this.view.</p>
  
  <pre><code> this.chartHeight = this.view.parentNode.getBoundingClientRect().height
   this.chart = {
                  renderTo:    that.view, //'chart-container',
                       };
  </code></pre>
  
  <p>So while understanding this, I want to know, what the difference is between this.view and that.view.</p>
  
  <p>Thanks</p>