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Chetan Rohilla
Chetan Rohilla

Posted on • Originally published at readymadecode.com

Drag and Drop List in React

In our react applications we organizes some data in the form of list. We can show data in ordered list and unordered list. In our applications, sometimes we needs to set order of our list items. So, to do this we can create drag and drop list in react which is easy to set order of list from UI.

Create Drag and Drop List in React

var placeholder = document.createElement("li");
placeholder.className = "placeholder";

class List extends React.Component {
  constructor(props) {
    super(props);
    this.state = {...props};
  }
  dragStart(e) {
    this.dragged = e.currentTarget;
    e.dataTransfer.effectAllowed = 'move';
    e.dataTransfer.setData('text/html', this.dragged);
  }
  dragEnd(e) {
    this.dragged.style.display = 'block';
    this.dragged.parentNode.removeChild(placeholder);

    // update state
    var data = this.state.colors;
    var from = Number(this.dragged.dataset.id);
    var to = Number(this.over.dataset.id);
    if(from < to) to--;
    data.splice(to, 0, data.splice(from, 1)[0]);
    this.setState({colors: data});
  }
  dragOver(e) {
    e.preventDefault();
    this.dragged.style.display = "none";
    if(e.target.className === 'placeholder') return;
    this.over = e.target;
    e.target.parentNode.insertBefore(placeholder, e.target);
  }
    render() {
    var listItems = this.state.colors.map((item, i) => {
      return (
        <li 
          data-id={i}
          key={i}
          draggable='true'
          onDragEnd={this.dragEnd.bind(this)}
          onDragStart={this.dragStart.bind(this)}>{item}</li>
      )
     });
        return (
            <ul onDragOver={this.dragOver.bind(this)}>
        {listItems}
      </ul>
        )
    }
}
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Use List Component in React

Now, we have <List /> Component we can use this in our class or functional component. Also, we can pass some props like colors props to our <List /> Component. For example, use this in our App Component.

class App extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            colors: ['PHP', 'MYSQL', 'REACT', 'LARAVEL']
        }
    }
    render() {
        return (
            <div>
        <List colors={this.state.colors} /> 
            </div>
        )
    }
}
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Style List in React

ul {
  list-style: none;
  margin:0;
  padding:0;
  border: 5px solid #e1e1e1;
  box-shadow: 1px 3px 8px #888; 
}

li {
  padding: 10px 15px;
  background:#eee;
  &:hover {
    background: darken(#eee, 5%);
  }
}

.placeholder {
  background: rgb(255,240,120);
  &:before {
    content: "Drop here";
    color: rgb(225,210,90);
  }
}
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Thanks:)
Happy Coding:)

Discussion (4)

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soulsaw1 profile image
soulsaw1

hey bro

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Chetan Rohilla Author

Yes bro :)

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soulsaw1

are u good at mongodb

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readymadecode profile image
Chetan Rohilla Author

yes