Thanks for using Syncfusion products.
The feature “HidePartialLabels –Show/Hide edge labels support in axis” isn’t not available in our HTML5 canvas(ChartAdv) chart control. Also, It is available only in MVC chart control(MVCChartModel). So, we will consider this functionality for HTML5 chart and it will be available in our forthcoming new version releases or service pack releases. Please let us know if any concerns.