By default, dropzone is a multiple file uploader and does not have specific option allowing us to switch to single file uploading mode, but this functionality can be achieved by adding more options to the plugin settings, such as maxfilesexceeded callback and maxFiles option set to 1. maxFiles: 1 is used to tell dropzone that there should be only one file.

By default, dropzone is a multiple file uploader. User can either click on the dropzone area and select multiple files or just drop all selected files in the dropzone area. This example is the most basic setup for dropzone.

Using this method, user gets an option to select the files using a button instead dropping all the files after selected from the folders. Set clickable to match the button's id for button to work as file selector.

In many case user must be limited to upload certain no. of files. You can always set the maxFiles option to limit no. of upload files. maxfilesexceeded event will be called if uploads exceeds the limit. Also, if you want to limit the file size of uploads then set the maxFilesize option. Define the maximum file size to be uploded in MBs like 0.5 MB as is in this example. User can also define maxThumbnailFilesize in MB. When the uploaded file exceeds this limit, the thumbnail will not be generated.

The default implementation of accept checks the file's mime type or extension against this list. This is a comma separated list of mime types or file extensions. Eg.: image/*,application/pdf,.psd. If the Dropzone is clickable this option will be used as accept parameter on the hidden file input as well.

This example allows user to remove any file out of all uploaded files. This will add a link to every file preview to remove or cancel (if already uploading) the file. The dictCancelUpload, dictCancelUploadConfirmation and dictRemoveFile options are used for the wording.

This example allows user to create a button that will remove all files from a dropzone. Hear for the button's click event and then call removeAllFiles method to remove all the files from the dropzone.