Drag And Drop File Html5 Player
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The audio player is compatible with mobile, tablets, desktop computers and all modern web browsers which include i. Phone, i. Pad, Android, Chrome, Safari, Firefox, Opera and Internet Explorer 7891. Drag Files Into the Browser From the Desktop using j. Query Event Binding. WEBINAR On demand webcast. How to Boost Database Development Productivity on Linux, Docker, and Kubernetes with Microsoft SQL Server 2. UHis.png' alt='Drag And Drop File Html5 Player' title='Drag And Drop File Html5 Player' />REGISTER Drag Files Into the Browser From the Desktop using j. Query Event Binding. A little while ago, I wrote how to use HTML5 Drag Drop and Java. Script File. Reader to accept image files from the Desktop and display them in the browser in an article entitled Drag Files Into the Browser From the Desktop with HTML5. I can see from user comments that the article would have perhaps benefitted from a demo. If only I had known about sites like JSFiddle and Codepen back then Eventually, a few readers took it upon themselves to post a demo thanks Dhanck and Jacob. Edmond. Kerr. Looking back at that code now, I can see how much effort went into making it cross browser compatible. Drag And Drop File Html5 Player' title='Drag And Drop File Html5 Player' />All that work could have been greatly minimized by employing a good JS library. It can take on the burden of managing browser inconsistencies so that we can focus on the problem at hand. With that in mind, todays article will present a j. Query enhanced version of the code from Drag Files Into the Browser From the Desktop with HTML5. I think that youll be pleasantly surprised at how much lighter the script is now, and to see that there is a demo this time around The Setup. This demo presents a table element that accepts files from the desktop or Windows Explorer. I originally tried a DIV but I didnt like that it didnt automatically expand vertically as more files were dragged over. A table does this automatically. The second row contains an empty unordered list to which we will append dropped files lt table idholder. Drop files herelt td. List lt ul lt td. The Script Explained. Binding Events j. Query stylej. Querys excellent on function makes it easy to attach multiple events and handlers to the same element or attach multiple handlers to the same event. In the first case, you just wrap the element in the j. Query selector and then invoke on as an instance method. It accepts an object where each namevalue pair represents an event or event name and event handler. To bind multiple handlers to the same event, you can separate the event names by a space. All of the drag drop related events have to be short circuited in order to prevent the browser from trying to open the files. Default. e. stop. Propagation. drop functione. The Drop Event Handler. The drop event handler contains a relatively small amount of dense functional style code also courtesy of j. Query. j. Query passes the event object to our handler, but it is not the native browser event. Query exposes it via the original. Event property, so that we can still access the underlying native event, if need be. The Drag. Event is a particular type of event that possesses a data. Transfer attribute. It in turn holds a reference to the files object, which contains a list of all the local files available from the data transfer. Since the files are stored within an array, we can check its length to see whether or not there are files to process. The array could have a zero length because the Data. Transfer object does support other object types. Once again, the event is prevented from bubbling before we process the files. Transfer e. original. Event. data. Transfer. Transfer data. Transfer. Default. e. stop. Propagation. more code here. The next bit of code has changed quite a bit as a result of the j. Query overhaul. For starters,. Inside the passed function, we instantiate a new File. Reader object. The onload event is set to our handler, just like before, except that this time, I replaced the closure with a call to j. Querys proxy function. Defloration Jacqueline Willis here. It conveniently binds some variables to the onload handler so that they are accessible to it. You never want to depend on variables and objects that reside in an outer scope to the handler as these can change by the time the handler executes. Finally, we invoke the File. Reader instances read. As. Data. URL method, passing in the current file. I also made use of the files type property to display a thumbnail of the image if applicable. The list item and image are appended in reverse order so that the last file dropped would appear at the top of the list. This is easy to achieve using the j. Query prepend function. Transfer data. Transfer. Default. e. stop. Propagation. Transfer. File. Reader. reader. List, event. var img file. List. prepend lt li. List. reader. read. As. Data. URLfile. The Demo. As promised, there is a full demo up on Codepen. Conclusionj. Query has been around a long time now, but its still my favorite JS library because once you are familiar with its idioms it really does take out the sting of coding for multiple browsers. If anyone wants to fork the demo and add functionality such as file upload capability, error handling, and more detailed progress reports, be sure to let everyone know in the comments Rob Gravelle resides in Ottawa, Canada, and is the founder of Gravelle. Web. Design. com. Rob has built web applications for numerous businesses and has recently developed his own jquery tables library. Robs alter ego, Blackjacques, is an accomplished guitar player, that has released several CDs. His band, Ivory Knight, was rated as one of Canadas top hard rock and metal groups by Brave Words magazine issue 9. National Heavy Metal charts on Reverb.