6

Drag and Drop List in React

 2 years ago
source link: https://dev.to/readymadecode/drag-and-drop-list-in-react-18h9
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
neoserver,ios ssh client

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>
        )
    }
}

Enter fullscreen mode

Exit fullscreen mode

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>
        )
    }
}

Enter fullscreen mode

Exit fullscreen mode

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);
  }
}

Enter fullscreen mode

Exit fullscreen mode

Please like share subscribe and give positive feedback to motivate me to write more for you.

For more tutorials please visit my website.

Thanks:)
Happy Coding:)


report

Recommend

About Joyk


Aggregate valuable and interesting links.
Joyk means Joy of geeK