script.aculo.us Drag & Drop onDrag Option Last Updated : 25 Dec, 2020 Summarize Comments Improve Suggest changes Share Like Article Like Report The script.aculo.us library is a cross-browser library that aims at improving the user interface of a website. The Drag & Drop module can be used to make any element drag-gable and also enables them to be dropped in a drop zone. The onDrag option is used to specify a callback function that would be invoked whenever the element is currently being dragged. The element which is being dragged would be passed as the parameter to the function. Include Scripts: Step 1: Before getting started, You will require to download the script files which are included in the <head> tag of our HTML page. You can download it from http://script.aculo.us/downloads Step 2: Unzip the files and put the required files (mainly prototype.js and scriptaculous.js) in the current root directory of your folder. Step 3: Place any image of your choice in the current root directory of your folder, like in the following example elem1.png is used. Syntax: { onEnd: function }Parameters: This option has a single value as mentioned above and described below: function: This is a callback function that would be invoked whenever the element is being dragged.The below example illustrates the use of this option. Example: HTML <!DOCTYPE html> <html> <head> <script type="text/javascript" src="prototype.js"> </script> <script type="text/javascript" src="scriptaculous.js"> </script> <script type="text/javascript"> window.onload = function () { // Define a function to be used // when the element is being dragged new Draggable('elem1', { onDrag: (elem) => { console.log("The element is " + "currently being dragged"); // The element that is being dragged // can be accessed using the parameter // in the callback function }, onEnd: () => { console.log("The dragging of " + "the element has stopped"); } }); }; </script> </head> <body> <div> <h1 style="color: green"> GeeksforGeeks </h1> </div> <strong> script.aculo.us Drag & Drop onDrag Option </strong> <p> The onDrag callback would be invoked whenever the element is being currently dragged. </p> <p> Drag the image below and check the console. </p> <img id="elem1" src="elem1.png"> </body> </html> Output: Reference: http://script.aculo.us/ Comment More infoAdvertise with us Next Article script.aculo.us Drag & Drop onDrag Option S sayantanm19 Follow Improve Article Tags : JavaScript Web Technologies script.aculo.us Similar Reads Non-linear Components In electrical circuits, Non-linear Components are electronic devices that need an external power source to operate actively. 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