Based on:
https://github.com/ThibaultJanBeyer/DragSelect

Key Features:

• No dependencies;
• Hyper customizable
• Replicates operating system drag-selection in the browser
• Accessibility (a11y)
• Add drag selection
• Use modifier keys to make multiple independent selections
• Select, Drag and Drop also via keyboard
• Choose which elements can be selected
• Supports all major browsers
• Selected elements can be dragged and dropped
• DragSelect was written with Performance in mind (can easily select >15.000 Elements)
• Supports SVG
• Supports mobile (touch interaction)
• Free & open source under MIT License
• Ease of use