## Day-based Month-wise data
The heatmap is a representation of day-wise data (similar to [the GitHub Contribution Graph]()). It spaces out data values linearly, across 5 levels (zero data kept exclusive).
In this case, the data has three parts,
```js
let data = {
dataPoints: {
"1426744959": 20,
"1463673055": 113,
"1476892421": 57,
// ...
},
start: startDate, // a JS date object
end: endDate
}
```
```js
let chart = new Chart("#heatmap", {
type: 'heatmap',
data: data,
})
```
(We are working on making the start date and end date implicit and optional). [tip]
The chart is rendered by the type `heatmap`:
```js
```