Friday, 25 October 2013

How to use HTML5 Download Attribute

HTML5 came with various new features like new attributes for forms, new input types as well as new API. One of the upgrade that came with HTML5 is the Download attribute.

As we know, there are many files that are not downloaded directly. For example: images, WebPages, PDF files, music files, etc. We have to right click on images and then click on Save Image to save an image file. But if I want to download an image file directly, then we have to use the download attribute.

Before going to Start, I will show you How to check Browser Support for this attribute.

For checking Browser support we have to use JavaScript:
var a = document.createElement('a');
if (typeof a.download != "undefined") {
     document.write('Download attribute supported');
}
else {
    document.write('Download attribute not supported');
}

If your Browser support it, It gives “Download attribute supported” message otherwise if gives “Download attribute not supported” message.

Using Download Attribute:
 
<a href="Image.jpeg" download>Download image</a>
  
Simply type download in the <a> anchor tag. By using this, when we click on download image, the image starts downloading. The same method is used for downloading PDF, webpage files (HTML), etc. (I am attaching a file in which I have shown a comparison between using the download attribute and not using it.)

If we want to rename the name of file that we are going to download irrespective of whatever be the name of file present in server then we have to write:
<a href="Folder/myimagehavenoname.png" download="myImage">Download image</a>
 
Here, we write download="myImage". When we click on Download image, then an image file is downloaded with  name myImage with a .png extension. The browser automatically detects the correct file extension and adds it to the downloaded file. So there is no need to add the file extension in the download attribute.

Chrome 14+ and Firefox 20+ supports the download attribute. I have tried and tested it in Chrome.

I am including a .zip file for downloading in which I am showing use of download attribute as well as for checking  Browser Support.

Download Source Code[4shared.com]

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