HTML Multiple File Upload Queue
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I am looking for some way to create a queue of sorts for a file upload button. With the following code:

    <input type = 'file' name = 'file[]' multiple = 'multiple' />

Modern browsers let you select multiple files at once to upload. However, if you click on the button again and choose more files (say from a different folder) it deletes the currently selected files. Is there any way to have the newly selected set of files not overwrite the old set?