Issues with D3 not functioning correctly when integrated with NPM

I have an angular project where I am looking to incorporate D3.js.

After running the command in my terminal:

npm i d3

I began writing the code below:

  buildGraph(){
    var x = scale.linear().domain([0, 5]).range([0, 5]);

    d3.select('.chart')
            .selectAll('div')
            .data(this.createdDataset)
            .enter().append('div')
            .style('width', function(d){ return x(d) + 'px'; })
            .text(function(d) { return d; });
  }

and imported D3 as:

import * as d3 from 'd3';

However, I encountered the following error message:

program-quality.component.ts 32:16-24 "export 'scale' (imported as 'd3') was not found in 'd3'

To rectify this, I attempted importing scales like this:

npm i d3-scale

    import * as scale from 'd3-scale';
    var x = scale.linear().domain([0, 5]).range([0, 5]);

Despite installing d3-scale, the error persisted. I verified that the file is present in my node_modules directory. Can anyone identify what mistake I might be making?

The complete code snippet from the component where I am encountering this issue is provided below:

import { Component, OnInit, Input, AfterContentInit } from '@angular/core';
import { CalculationsService } from '../../services/calculations.service';
import { ProgramQualityCalculationsService } from '../../services/program-quality-calculations.service';
import * as d3 from 'd3';
import * as scale from 'd3-scale';

@Component({
  selector: 'app-program-quality',
  templateUrl: './program-quality.component.html',
  styleUrls: ['./program-quality.component.css']
})
export class ProgramQualityComponent implements OnInit, AfterContentInit{

  constructor(private _programQualityCalculations: ProgramQualityCalculationsService) { }

  AssessmentDiagnosticsBasline;
  DevelopmentBasline;
  PerformanceManagementBaseline;

  createdDataset: Array<number> = [];


  @Input() answers;

  ngOnInit() {
    this.AssessmentDiagnosticsBasline = this._programQualityCalculations.generateAssessmentDiagnosticsBaseline(this.answers);
    this.DevelopmentBasline = this._programQualityCalculations.generateDevelopmentBaseline(this.answers);
    this.PerformanceManagementBaseline = this._programQualityCalculations.generatePerformanceManagementBaseline(this.answers);
    this.createdDataset.push(this.AssessmentDiagnosticsBasline, this.DevelopmentBasline, this.PerformanceManagementBaseline);
    console.table(this.createdDataset);
  }

  ngAfterContentInit(){
    this.buildGraph();
  }

  buildGraph(){
    var x = scale.linear().domain([0, 5]).range([0, 5]);

    d3.select('.chart')
            .selectAll('div')
            .data(this.createdDataset)
            .enter().append('div')
            .style('width', function(d){ return x(d) + 'px'; })
            .text(function(d) { return d; });
  }


}

Answer №1

To utilize D3 in your project, make sure to have types/d3 installed

Run the following command: npm install --save-dev @types/d3

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