Project: chart
Task (easy): - Check or uncheck `#axes` to create `LineChart` instance `chart` with config whose attributes values:
  - type: the value of `#type`, default is `line`
  - id: `{type}Chart`
  - data: imported from `./assets/data.js`
  - options: 
    - axes: the `checked` value of `#axes`
- Call `chart.draw()`
- Clear `#chart`, append `chart.svg` to `#chart`
- Save codes as a function `createChart()` in `index.js`