I'm looking to create a unique combination of a line and bar chart. Any advice on how to

When I stretch my Scale like this

  determineDataLimits: function () {
    var min = Math.min.apply(null, this.chart.data.datasets[0].data)
    console.log(this)
    console.log(defaultConfigObject)
    Chart.options.scales.rightSide.ticks.min = function () {
      minValue + 5
      return minValue
    }
    this.options.ticks.min = minValue
  }
})

Chart.scaleService.registerScaleType('myScale', MyScale, defaultConfigObject)

However, when I apply this type in options for ticks, it results in a console error that says cannot read property of data undefined.

Additionally, when I log defaultConfigObject, it shows as undefined.

What should be used instead of defaultConfigObject?

I anticipate the chart rendering correctly so I can adjust where my line starts. Specifically, I want to position my line in the middle of the Y-axis on my combo line and bar diagram with dynamic data.

Environment

Chart.js version: vue

Answer №1

I believe there may have been a misunderstanding of the documentation. The documentation actually mentions (emphasis added):

After creating your scale class, it must be registered with the global chart object in order to be utilized. An initial configuration for the scale can be specified during registration of the constructor. The first parameter when using the register function is a string key that will later identify which scale type should be used in a chart.

Chart.scaleService.registerScaleType('myScale', MyScale, defaultConfigObject);

This indicates that you have the ability to provide an object to be received by your scale class upon registration. The term `defaultConfigObject` is essentially placeholder text demonstrating the signature of the `registerScaleType` function. For instance, you might implement it like this:

 Chart.scaleService.registerScaleType('myScale', MyScale, { myprop: true });

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