@dflex/draggable

@dflex/draggable

Draggable is a native utility written in pure JS works for Web and Mobile

DFlex draggable is the simplest solution to create JavaScript draggable elements. No need for a special tutorial and thinking about implementation complexity or even migration to different technologies for different frameworks. It can be used with any app you have whether it is React, Vue, Angular or Svelte.

Documentation

Visit DFlex site for more https://jalal246.github.io/dflex/ and to see live examples with the full code.

Installation

npm install @dflex/draggable

Features

• You can add strictly draggable, moving only horizontal or vertical by yourself because you control dragging coordinations.

• You can control the clickable area, simply because it's a mouse event. Could be on the entire element or a small button of the element. It's up to you.

• You know when the dragging is going to start and end without adding additional API functions.

• It can be nested dragging. Related to a list of elements or just one element It doesn't matter. It is always the same.

API

import { store, Draggable } from "@dflex/draggable";

Registry

Register draggable element in draggable store:

store.register({ id: string, ref: HTMLElement });

Draggable Instance

Create draggable instance with onmousedownhandler

const draggable = new Draggable(id: string, {x: event.clientX, y: event.clientY});

Movement

Move the element with onmousemove handler

draggable.dragAt(event.clientX, event.clientY);

End Dragging

You can end dragging withonmouseup handler

draggable.endDragging();

Add Custom Style

While you can add style, classes related to drag since you trigger dragAt and endDragging. You can also control the few style properties that Draggable use when dragging.

When create draggable Instance you can use draggedStyle: Array<draggedStyleObj>

draggedStyleObj: {
  prop: string;
  dragValue: string;
  afterDragValue:? string;
}

Default value for draggedStyle:

const draggedStyle = [
  {
    prop: "zIndex",
    dragValue: "99",
    afterDragValue: null,
  },
];

You can change it after creating dragged instance. The following example will change background color red during the drag and purple after finish dragging.

draggable.draggedStyle = [
  {
    prop: "zIndex",
    dragValue: "99",
    afterDragValue: null,
  },
  {
    prop: "pointerEvents",
    dragValue: "pointer",
    afterDragValue: null,
  },
  {
    prop: "background",
    dragValue: "red",
    afterDragValue: "purple",
  },
];

Implementations

• Full React example

• Full Vue example

Project Content

DFlex Draggable is part of project contains:

• DOM Generator DOM relations generator algorithm. Generate relations between DOM elements based on element depth without a browser.

• DOM Store The only Store that allows you to traverse through the DOM tree using element id without reading from the browser.

• Drag & Drop A Simple, lightweight Solution for a Drag & Drop App based on enhanced DOM store algorithm. You can achieve a drag and drop with three steps only with mouse event.

Test

yarn test draggable

License

This package is licensed under the GPL-3.0 License

Contribution

If you like this project, you can support it by contributing. If you find a bug, please let me know, applying a pull request is welcome. This project needs your support. You can fix typos, add new examples, or build with me new features.

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