React Drag and Drop List

Light and customizable drag and drop list for React, with no additional dependencies.

Demo

Check out the demo page here. See the code in the demo directory of this repo.

Getting started

Install:

npm install --save react-dnd-list

Import:

import DnDList from 'react-dnd-list'

Create your item component:

const Item = props => {
  const dnd = props.dnd

  return (
    <li
      style={{ ...dnd.item.styles, ...dnd.handler.styles }}
      className={dnd.item.classes}
      ref={dnd.item.ref}
      {...dnd.handler.listeners}
    >
      {props.item}
    </li>
  )
}

dnd props are essential for the drag and drop functionality. Assign dnd.item.styles, dnd.item.classes, and dnd.item.ref to the outer DOM component. Do not override transform and transition styles of that component!

dnd.handler.listeners is an object containing two keys: onMouseDown and onTouchStart, with appropriate functions as values. Together with dnd.handler.styles, assign it to a component that will initiate drag on click or touch.

The item prop is just a value from your array of items (look below).

Warning! Do not use margins on item components – use padding instead. Support for margins will be added in near future.

Create your list component:

const MyList = () => {
  const [list, setList] = useState(['1', '2', '3'])

  return (
    <ul>
      <DnDList
        items={list}
        itemComponent={Item}
        setList={setList}
      />
    </ul>
  )
}

You need to provide DnDList with an array of items, its update function, and the item component (the one we created earlier).

That's it, you now have a functional drag and drop list!

Customization

Item component

You have access to a few more props inside your item component:

Name	Types	Description
itemInDrag	boolean	true if the item is being dragged.
listInDrag	boolean	true if any of the items in your list is being dragged.
index	number	Item's index in the list.
last	boolean	true if the item is last in the list.

List component

There are several props you can pass to DnDList to customize it:

Name	Type	Default	Description
horizontal	boolean	false	Let's you swap items horizontally if set to true.
transitionStyles	object	–	Let's you override default CSS transition styles, for example { transtitionDuration: '.5s' }.
disableTransitions	boolean	false	Disables swap transitions if set to true.

Function props:

Name	Args	Returns	Description
setSwapThreshold	size (number)	number	Let's you set a swap threshold for every item in the list individually, based on their size (height or width, depending on the type of the list). For example size => size * 0.5 will result in elements being swapped after the dragged element has traversed more than 50% of their size.
setOverflowThreshold	size (number)	number	Function similar to setSwapThreshold. Let's you set how far the dragged item can be moved over the list container bounds, based on its (the dragged item) size.

By default swap threshold is set to 1, and overflow threshold to 0.