example world class importing cell class

world.es6

// import Cell class
import Cell from './Cell.es6';

class World {
  constructor (cols, rows) {
    this.cols = cols;
    this.rows = rows;
    this.cellGrid = [];
    this.makeGrid();
  }

  makeGrid () {
    let i = 0;
    while (i < this.rows) {
      let rowArray = [];
      let j = 0;
      while (j < this.cols) {
        let cell = new Cell(false, j, i); // use Cell class initialize method
        this.cells.push(cell);
        rowArray.push(cell);
        j++;
      }
      this.cellGrid.push(rowArray);
      i++
    }
  }
}

export default World;