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drag-tabs

A tiny utility that makes tabs inside a container draggable.

Features

• Makes elements inside a drag container draggable
• Supports ignored elements
• Emits drag, start, cancel and end events
• Does not perform actual dragging
• Singleton (per element)

How it Works

Given you got an element with the following HTML markup:

var $el = (
  <div>
    <ul class="my-tabs-container">
      <li class="my-tab"></li>
      <li class="my-tab"></li>
      <li class="my-tab ignore-me"></li>
    </ul>
  </div>
);

Create the dragger:

var dragger = dragTabs($el, {
  selectors: {
    tabsContainer: '.my-tabs-container',
    tab: '.my-tab',
    ignore: '.ignore-me'
  }
});

Listen to drag events emitted via the DragTabs instance and use the updates to move the tabs to the appropriate position:

dragger.on('drag', function(context) {
    var dragTab = context.dragTab,
        newIdx = context.newIdx;

  // move the tab to the new position
});

// move the tab to the initial position
dragger.on('cancel', function(context) {});

Emitted Events

The DragTabs instance is an event emitter that fires the following events:

• start: tab dragging starts
• drag: fired on every position update
• end: always fired at the end of the drag
• cancel: only fired when the dragging is canceled

The events drag, end and cancel are emitted with the following context:

{
  dragTab: {HTMLElement},
  newIndex: {Number}
}

The event start is fired with the following context:

{
  dragTab: {HTMLElement},
  initialIndex: {Number}
}

Manually Update Dragger

To trigger a manual update on the DragTabs instance, i.e. because the displayed tabs change call DragTabs#update:

dragger.update();

How to Test

npm run test

License

MIT