James,
CanvasJS does support a feature similar to plotBands in Highcharts called stripLines. You can use stripLines in two ways:
- Single threshold (value): You can set a value for the stripLine to highlight a single threshold on the axis.
- Range (startValue and endValue): You can define both startValue and endValue to highlight a specific region, effectively creating a plotBand-like effect to emphasize a section of the chart between two axis values.
Please find the code-snippet for creating a stripLine (plotband) below:
axisY:{
stripLines:[{
startValue: 25,
endValue: 32,
color: "#d8d8d8"
}]
}

—
Vishwas R
Team CanvasJS