Uploading files using Ajax without the need for additional plugins or submitting a form

I have been struggling to find a solution for uploading files via Ajax when the input field is not enclosed within a form tag. I have already attempted this method.

This is the HTML snippet:

<span id="user-image-up-btn">Upload Image</span>
<input id="user_image_upload" type="file" />

When implementing my code, I encountered the error message

TypeError: undefined is not an object (evaluating '$("#user_image_upload").files')
, or when using an alternative method, I received Object, object.

This is my jQuery script:

// IMAGE UPLOAD
$("#user_image_upload").change(function() {
    var fileform = new FormData();
    fileform.append('pictureFile', $("#user_image_upload").files[0]);
    $.ajax({
        url: '/userimageupload',
        type: 'POST',
        processData: false,
        contentType: false,
        dataType : 'json',
        data: fileform,
        beforeSend: function(){ 
            $("#user-image-up-btn").html('Uploading...');
            console.log(fileform);
        },
        success: function(data){
            $("#user-image-up-btn").html('Upload Image');
            console.log(fileform);
        },
        error: function(exception){
            alert('error:'+exception);
            console.log(fileform);
        }
    });
});

EDIT: Although I was able to upload the files by following Adeneo's advice, I am still encountering error:[object Object], which causes issues with the rest of the form. Why could this be happening?

Answer №1

A jQuery object does not contain a property called 'files', as that would be part of the underlying DOM node

$("#user_image_upload").on('change', function() {
    var fileform = new FormData();
    fileform.append('pictureFile', this.files[0]);

    $.ajax({
        url: '/userimageupload',
        type: 'POST',
        processData: false,
        contentType: false,
        dataType : 'json',
        data: fileform,
        beforeSend: function(){ 
            $("#user-image-up-btn").html('Uploading...');
        },
        success: function(data){
            $("#user-image-up-btn").html('Upload Image');
        },
        error: function(exception){
            alert('error:'+exception);
        }
    });
});

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