Recently I tried to modify the display units and periods at toolbar side so that I can create a self define units and periods for the time chart. According to the documentation, the custom display units and periods can be set as shown as below:
<script>
area:{
displayUnits:[
{unit: "1 day"},
{unit: "2 day"},
{unit: "5 day"}
],
displayPeriods:[
{unit: "3 month"},
{unit: "5 month"}
]
}
</script>
However, the "displayPeriods" seems like is not functioning. Below is an example that replicates this problem: https://jsfiddle.net/YeongCY/18tmL1w1/