The error message "Highcharts - Incompatible types of 'series' property" is displayed

When trying to create charts in Angular using Highchart, I encountered an error during compilation. The properties seem to be compatible, but the TypeScript compiler is throwing an error that I don't quite understand. Any suggestions on how to avoid this error? I am currently using Angular 11.

 error TS2322: Type '{ chart: { type: string; }; title: { text: string; }; xAxis: { categories: string[]; }; yAxis: { title: { text: string; }; }; series: ({ name: string; data: number[]; type: string; color?: undefined; } | { name: string; data: number[]; type: string; color ...
      [options]="chartOptions"
          ~~~~~~~~~~~~~~~~~~~~~~~~
    
import { Component, OnInit } from '@angular/core';
import * as Highcharts from 'highcharts';

title = 'myHighchart';
Highcharts: typeof Highcharts = Highcharts;

data = [{
    name: 'ItSolutionStuff.com',
    data: [500, 700, 555, 444, 777, 877, 944, 567, 666, 789, 456, 654],
    type: "spline",
}, {
    name: 'Nicesnippets.com',
    data: [677, 455, 677, 877, 455, 778, 888, 567, 785, 488, 567, 654],
    type: "spline",
    color: '#3183F5'
}];

chartOptions = {
    chart: {
        type: "spline"
    },
    title: {
        text: "Monthly Site Visitor"
    },
    xAxis: {
        categories:["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
    },
    yAxis: {
        title:{
            text:"Visitors"
        }
    },
    series: this.data
};

<highcharts-chart
[Highcharts]="Highcharts"
[options]="chartOptions"
style="width: 100%; height: 400px; display: block;">
></highcharts-chart>
angulartypescripthighcharts

Answer №1

Ensure your data is accurate, and consider how using the any type for casting will function, such as chartOptions: any = ....

It's important to adhere to best practices by not initializing the chart with predefined series like series: this.data. Instead, it's recommended to create separate variables for each element of the series, such as name, data, color, and so on, or store them in an array. The complete structure of the series must be defined within the chartOptions to avoid errors.

series: [
  {
    name: this.name1,
    type: "spline",
    data: this.data1
  },
  {
    type: "spline",
    data: this.data2,
    name: "Nicesnippets.com",
    color: "#3183F5"
  }
]

You may also consider creating your own TypeScript interface or extending an existing one for better organization.

Check out the demo here: https://stackblitz.com/edit/highcharts-angular-basic-line-dpqftl

Answer №2

show:this.info as ShowType[]

I found success with this solution.

Answer №3

SeriesOptionsType serves as a compilation of various series options types, excluding the specification of data. Each series options type outlines the specifics of data tailored to that particular series type. For a spline chart like yours, it is recommended to utilize SeriesSplineOptions instead.

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