The Syncfusion native Blazor components library offers 70+ UI and Data Viz web controls that are responsive and lightweight for building modern web apps.
.NET PDF framework is a high-performance and comprehensive library used to create, read, merge, split, secure, edit, view, and review PDF files in C#/VB.NET.
So if any control for Javascript please suggest Thanks for reaching us. We have already logged this feature in DropDownList control. As well as the MultiColumnDropDown can be achieved by using template concept in the DropDownList control. We have done the sample for that scenario using Javascript, please refer the below link. http://www.syncfusion.com/downloads/support/forum/121333/ze/f121333-635245752 Feature Link: