title: Draw horizontal target line using EChart.JS
body: <p>I would like to draw a horizontal target line showing threshold limits on a line, bar and pie chart using EChart.JS (<a href="https://ecomfe.github.io/echarts-doc/public/en/index.html" rel="nofollow noreferrer">https://ecomfe.github.io/echarts-doc/public/en/index.html</a>).</p>
  
  <p>There are other threads - "Chart.js - draw horizontal line" which detail how to do it with Chart.JS. Has anyone out there got particular experience on this with EChart?</p>
  
  <p>Thanks in advance.</p>