title: Chart.js 2.1.6: Drawing horizontal Limit Lines?
body: <p>I need to draw horizontal limit lines for my line and my combined (bar and line) charts. There was a solution for Chart.js &lt; 2.0 like shown here:</p>
  
  <p><a href="https://stackoverflow.com/questions/31092489/chart-js-draw-horizontal-line">draw horizontal line</a></p>
  
  <p>but this solution is no longer working with chart.js > 2.0:</p>
  
  <pre><code>jquery.1.12.1.js:9743 Uncaught TypeError: Cannot read property 'extend' of undefined
  </code></pre>
  
  <p>So how am i supposed to draw limit lines in Chart.js 2.1.6?</p>