icon Attachments

The Attachments field allows users to attach files to the form. It’s possible to do it by either uploading files manually or by dragging and dropping them into the field. Possible to drag and drop multiple files at once.

This page contains the detailed description of the field properties and JavaScript samples which you can use with this field.


Common Properties

Attachments Properties

Here you can find properties specifically related to the Attachments field.

Max Size (Kb)

Select the max possible size of an individual attached file. Default max file size is 10240, but you can restrict it down, or increase it (if your Public web forms subscription plan allows it).

Max Size (Kb) property

Allowed Ext.

Choose what files should be allowed to upload. Extensions should have a dot in front of them, should be placed on different lines. If empty, all extensions are allowed.

Allowed Extensions property

JavaScript framework

In this section, you can find basic examples of how to work with the field using JavaScript.

For more examples, check out Working with form fields in JavaScript article. If you are not familiar with the JavaScript framework, get started with the JavaScript basics.


The field is only accessible once the form is rendered, so all calls to the field must be inside fd.spRendered event:

    //make field required
    fd.field('Field1').required = true;

Get field value

Access uploaded files with the following properties:

//get field value
var uploads = fd.field('Field1').value;

//get first file name
var filename = fd.field('Field1').value[0].file;
//get first file size
var filesize = fd.field('Field1').value[0].size;
//get first file URL
var fileurl = fd.field('Field1').value[0].url;

//loop through all files

Upload status

The property indicates whether the field is uploading files.


Handle change event

Execute a function when a field value has been changed:

fd.field('Field1').$on('change', function(value) {
    //log changes to browser's console
    console.log('New value: ' + value);

Make field required

Make a field required or optional:

//make field required
fd.field('Field1').required = true;

//make field not required
fd.field('Field1').required = false;

Disable field

Make a field non-editable. The field value can still be changed with JavaScript and saved:

//disabled field
fd.field('Field1').disabled = true;

//enable field
fd.field('Field1').disabled = false;

Get HTML element

Access HTML element inside the field in order to modify it, hide it, or do something else.

//access field's control
var htmlField = fd.field('Field1').$el;

//access field's block, which includes title and control
var htmlFullField = fd.field('Field1').$parent.$el;

Hide field

Hide a field from a user. The field value can still be accessed and changed with JavaScript:

//hide field
fd.field('Field1').hidden = true;

//show field
fd.field('Field1').hidden = false;

Cоnfigure widget

You can access the widget used by the field. The widget is based on Kendo UI Upload.

// get the widget

// change the widget's configuration
    multiple: false