javascript - How to create circle to outer of circle in line of chart in c3.js? -

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i started learn c3.js. pretty work with.

i got stuck in part, hope can me go forward .

how create circle in outer of circle in line chart using c3.js .

this example code 

var chart = c3.generate({   data: {     columns: [         ['data1', 30, 200, 100, 150, 150, 250],         ['data12', 30, 200, 100, 150, 150, 250]     ],     type: 'line'   }, });

it giving 1 small circle ( dot kind of ) want create 1 more circle different color , inside of circle need show small circle (dot kind of ) .

how that?

i have tried select circle , apply border .i have tried this

 d3.selectall('circle').each(function(){      this.style('border-radius: 20px;');   });

this wrong way, not working. how ?

is possible in c3.js?

you can set size of point using chart options

... point: {     r: 20 } ...

and can draw border using css

#chart .c3-circle {     stroke: black;     stroke-width: 4; }

(assuming drawing chart in container id chart)

fiddle - http://jsfiddle.net/yhz8k5k9/

enter image description here


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