Error bars plugin example

View code:


Chartist.plugins.errorBars = function (options) { 
  options = Chartist.extend({}, defaultOptions, options);

  function addErrorBar(lineLength, data){
    var errBar = new Chartist.Svg('line', lineLength, 'ct-error');
    data.element.parent().append(errBar);
  }	  
  
  return function errorBars(chart){
    if( chart instanceof Chartist.Bar || chart instanceof Chartist.Line ){
      chart.on('draw', function(data) {
        var lengthCalculator = lineLengthCalculation[data.type] && lineLengthCalculation[data.type][options.orientation] || lineLengthCalculation[data.type];
        if(lengthCalculator){
          addErrorBar( lengthCalculator(data, options), data );
        }
      });
    }
  }
};