Here's how I understand your code:

Each time the first button in the dom is clicked a file input dialogue which accepts multiple files is generated. Upon return the dialogue emits a change event with a files variable (a FileList object) attached to the function context (this). Your code pushes the newly created FileList onto the files array. Since the input accepts multiple files each object pushed onto the files array is a FileList object.

So if you want to iterate through all elements in the files array you can put a function in the change event handler:

var files = [];

$(button:first).on(click, function(e) {

    $(<input>).prop({

        type: file,

        multiple: true

    }).on(change, function(e) {

        files.push(this.files);

        iterateFiles(files);

    }).trigger(click);

});





function iterateFiles(filesArray)

{

    for(var i=0; i<filesArray.length; i++){

        for(var j=0; j<filesArray[i].length; j++){

            console.log(filesArray[i][j].name);

            // alternatively: console.log(filesArray[i].item(j).name);

        }

    }

}

In the iterateFiles() function I wrote filesArray[i][j] isn't really a multidimensional array -- but rather a single dimensional array containing FileList objects which behave very much like arrays...except that you can't delete/splice items out of them -- they are read-only.

For more info on why you can't delete see: How do I remove a file from the FileList