title: Draw special line with js framework
body: <p>I want to draw a line with x and y axis like this <img src="https://i.stack.imgur.com/OuuGN.png" alt="enter image description here">.</p>
  
  <p>I searched Google and have found <a href="http://c3js.org/examples.html" rel="nofollow noreferrer">an example</a> based <code>d3</code>. It can draw spline chart, but i can not find the kind of chat.</p>
  
  <p>Can <code>d3</code> or <code>c3</code> or any others framework draw line like this? What function should I use?</p>