neckWidth: Number/String

neckWidth property allows you to set width of neck in Funnel Chart. Value can either be in pixels (number – ex: 100) or percent (string – ex: “80%”). Percent values are relative to the auto calculated head width of funnel.

Default: Automatically calculate in order to best fit the indexLabels
Example: 100, 150, “30%”, “35%”

• Pixel values are Numbers.
• Percent values are strings.
• Works only in Funnel Chart

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
  data: [{
   type: "funnel",
   neckWidth:  "20%"
 
  },
 ]
 .
 . 
});
chart.render();