text: import d3 from 'd3';
  import React, { Component } from 'react'
  
  class Timeline extends Component {
    constructor({data = []}) {
      super({data});
      const times = d3.extent(data.map(d => d.year));
      const range = [50, 450];
      this.state = { data, times, range};
    }
  
    componentDidMount() {
      
    }
  }
  