What is the Drag and Drop API?

The Drag and Drop API is a built-in browser capability that allows web applications to make elements on a webpage interactive through dragging and dropping. Instead of forcing users to click buttons or select items from drop-down menus, this browser feature enables users to click on an item, hold down the mouse button or touchscreen, move the item across the screen, and release it over a designated area. The browser automatically tracks the movement coordinates, mouse state, and transfer data throughout the entire process.

At its core, this API exposes a set of event listeners—hooks provided by the browser to run code when specific interactions happen—that fire as an item is picked up, dragged over drop targets, and finally released.

A Real-Life Analogy: The Corkboard and Sticky Notes

Imagine you have a physical corkboard on your office wall divided into three columns: "To Do," "In Progress," and "Done." Each task is written on a physical sticky note.

When you decide to…