Javascript drag and drop library

A JavaScript library to visualize JSON as tree diagrams (flowhcharts). Supports nested objects, arrays, and custom styles for clear data representation. DemoDownload Drawflow is a JavaScript library to dynamically generate a pretty flowchart via drag and drop. DemoDownload A standalone JavaScript library for creating flowcharts & relationship diagrams using SVG and plain JavaScript. DemoDownload js2flowchart is a pure JavaScript library used to dynamically render JS code flowchart diagrams using SVG. DemoDownload A Pure CSS library to render a Process Flow Diagram illustrating the relationships between nodes defined in nested HTML lists. DemoDownload diagramflowjs is a JavaScript library to draw an interactive, editable flowchart representing workflows, decisions, complex process, and much more. DemoDownload jsdragblocks is a JavaScript to visualize the relationship between two block elements by creating directional arrows between nodes via drag and drop. DemoDownload Pinker.js is a vanilla JavaScript library which renders a canvas based flow chart from plain text to represents a workflow, process, or decisions. DemoDownload flowcharty is a JavaScript library that makes uses of d3.js to dynamically generate SVG flowchart to represent your algorithm, workflow or process. DemoDownload flowjs is a JavaScript library built with CreateJS that allows you to render dynamic, animated flow charts using html5 canvas API. DemoDownload

React drag and drop (React DnD) is a beautiful and accessible drag and drop library made for React apps that let’s build interactive experiences. It supports touch interactions on mobile devices and HTML5, but it depends on touch support. One popular app that uses this drag and drop interaction is Trello.In this post, we will learn how to build a page filled with images that allow anyone to move an image around to another position within the app in response to the drag and drop events.The complete project is on CodeSandbox.## PrerequisitesTo complete the exercise in this post, we need the following:- Basic knowledge of JavaScript and React.- Node.js installed on our computer.## Getting StartedReact is a JavaScript frontend library for generating and building user interfaces for web applications.To scaffold a new project, run the following command in our terminal:```shnpx create-react-app After the installation, navigate to the created directory and run the command below to start the application:cd # navigate to the directory npm run start # run the development serverCode language: PHP (php)React.js starts the development environment on the whole setup done, run either of the commands below to install the react-dnd ****and ****react-dnd-html5-backend libraries to our project:yarn add react-dnd react-dnd-html5-backend # or npm install react-dnd react-dnd-html5-backendCode language: PHP (php)react-dnd-html5-backend: This library will allow the use of the drag and drop API with react``-``dnd.Now, let’s implement the drag and drop functionality in the project’s entry point , index.js , with the provider component.// src/index.js// other imports // add thisimport

The item (id and index) property that match the drop targets about the drag source.collect: The property contains a callback function that receives the isDragging props and monitor parameter.monitor: It allows you update the props of your components in response to the drag and drop state changes.Let’s import the useDrop component from the React DnD library.// src/App.jsimport { useDrag, useDrop } from "react-dnd";Code language: JavaScript (javascript)useDrop: This hook acts as a drop target in our component into the DnD system.Next, update and add the following code in the App.js file:// React importimport { useDrag, useDrop } from "react-dnd"; // data image import const Card = ({ src, title, id, index }) => {const ref = React.useRef(null); const [, drop] = useDrop({ accept: "image", hover: (item, monitor) => { if (!ref.current) { return; }const dragIndex = item.index;const hoverIndex = index;if (dragIndex === hoverIndex) { return;}const hoverBoundingRect = ref.current?.getBoundingClientRect();const hoverMiddleY = (hoverBoundingRect.bottom - hoverBoundingRect.top) / 2;const clientOffset = monitor.getClientOffset();const hoverClientY = clientOffset.y - hoverBoundingRect.top;if (dragIndex return;}if (dragIndex > hoverIndex && hoverClientY > hoverMiddleY) { return;}moveImage(dragIndex, hoverIndex);item.index = hoverIndex;}}); // useDrag component const opacity = isDragging ? 0 : 1;drag(drop(ref));return ( div ref={ref} style={{ opacity }} className="card"> img src={src} alt={title} /> div>);} // App componentCode language: JavaScript (javascript)The above code does the following:drop: It is called when a compatible item on the app is dropped on the target.hover(item, monitor): The hover function helps to move things around.!ref.current: Check whether the current attribute doesn’t exist at the defined variable ref from the useRef hook.