I want to create a forecast chart with Actual (a line chart) and projected values (a dotted chart). Here is an example made with Excel:

I want to create the same chart using the ECharts library but I couldn't find any example to use from their web page https://echarts.apache.org/examples/en/:

It would be very helpful if there is an approach to build this chart using javascript, I don't mind using other libraries like ChartJs if they have this possibility.