How to Validate the Size and Type of Input=File in HTML5

<!-- (IE 10+, Edge (EdgeHTML), Edge (Chromium), Chrome, Firefox 42+) --> 
<input type="file" accept=".xls,.xlsx" />

Limit the size of a file upload (html input element)

This is completely possible. Use Javascript.

I use jQuery to select the input element. I have it set up with an onChange event.

$("#aFile_upload").on("change", function (e) {

    var count=1;
    var files = e.currentTarget.files; // puts all files into an array

    // call them as such; files[0].size will get you the file size of the 0th file
    for (var x in files) {
    
        var filesize = ((files[x].size/1024)/1024).toFixed(4); // MB
    
        if (files[x].name != "item" && typeof files[x].name != "undefined" && filesize <= 10) { 

            if (count > 1) {
                
                approvedHTML += ", "+files[x].name;
            }
            else {
            
                approvedHTML += files[x].name;
            }

            count++;
        }
    }
    $("#approvedFiles").val(approvedHTML);

});

The code above saves all the file names that I deem worthy of persisting to the submission page before the submission actually happens. I add the "approved" files to an input element's val using jQuery so a form submit will send the names of the files I want to save. All the files will be submitted, however, now on the server-side, we do have to filter these out. I haven't written any code for that yet but use your imagination. I assume one can accomplish this by a for loop and matching the names sent over from the input field and matching them to the $_FILES (PHP Superglobal, sorry I don't know ruby file variable) variable.

My point is you can do checks for files before submission. I do this and then output it to the user before he/she submits the form, to let them know what they are uploading to my site. Anything that doesn't meet the criteria does not get displayed back to the user and therefore they should know, that the files that are too large won't be saved. This should work on all browsers because I'm not using the FormData object.

Validate file size and type in a multiple input

Change type of submit button to normal button and use onclick handler for it by giving a id as upload,

<form action="step2_crud_dev.php" method="post" enctype="multipart/form-data" class="form-horizontal" role="form" id="dataPribadi"  >
    <div>
        <input type="file" name="fUpload1" id="fileUpload1"/>
        <input type="file" name="fUpload2" id="fileUpload2"/>
        <input type="file" name="fUpload3" id="fileUpload3"/>
    </div>
    <div>
        <input type="button" id="upload" value="upload" />
    </div>
</form>

and your click event handler should be,

$(document).ready(function(){
    $('#upload').click(function(){
        alert('hello');
        $('input[type="file"]').each(function(){
            var thisFile = $(this);
            var fileSize = thisFile[0].files[0].size;
            alert(fileSize);
        });
        $('form#dataPribadi').submit();
    });
});

UPDATED FIDDLE

How to allow input type= file to accept only image files?

Use the accept attribute of the input tag. To accept only PNG's, JPEG's and GIF's you can use the following code:

<label>Your Image File
  <input type="file" name="myImage" accept="image/png, image/gif, image/jpeg" />
</label>

if (typeof FileReader !== "undefined") {
    var size = document.getElementById('myfile').files[0].size;
    // check file size
}

<input type="file" id="myFile" />

//binds to onchange event of your input field
$('#myFile').bind('change', function() {

  //this.files[0].size gets the size of your file.
  alert(this.files[0].size);

});