Upload

Upload files through a file input form element or a placeholder area.

Usage

This JavaScript component utilizes the latest XMLHttpRequest Level 2 specification and provides the ability of uploading files via Ajax including tracking of the upload progress. The component provides two ways of uploading files: select and drop. While the select request can only be applied to <input type="file"> elements, you can basically use any element with drop, which enables you to simply drag and drop files from your desktop into the specified element to upload them. Note that this component does not handle your file uploads on the server.


Select

In this example we are using a simple button which opens up the file select window.

  • <div class="js-upload" uk-form-custom>
        <input type="file" multiple>
        <button class="uk-button uk-button-default" type="button" tabindex="-1">Select</button>
    </div>

Drop area

This example shows how to realize a drop area with the option to select the file from a file window.

  • Attach binaries by dropping them here or
    selecting one
  • <div class="js-upload uk-placeholder uk-text-center">
        <span uk-icon="icon: cloud-upload"></span>
        <span class="uk-text-middle">Attach binaries by dropping them here or</span>
        <div uk-form-custom>
            <input type="file" multiple>
            <span class="uk-link">selecting one</span>
        </div>
    </div>
    
    <progress id="js-progressbar" class="uk-progress" value="0" max="100" hidden></progress>
    
    <script>
    
        var bar = document.getElementById('js-progressbar');
    
        UIkit.upload('.js-upload', {
    
            url: '',
            multiple: true,
    
            beforeSend: function () {
                console.log('beforeSend', arguments);
            },
            beforeAll: function () {
                console.log('beforeAll', arguments);
            },
            load: function () {
                console.log('load', arguments);
            },
            error: function () {
                console.log('error', arguments);
            },
            complete: function () {
                console.log('complete', arguments);
            },
    
            loadStart: function (e) {
                console.log('loadStart', arguments);
    
                bar.removeAttribute('hidden');
                bar.max = e.total;
                bar.value = e.loaded;
            },
    
            progress: function (e) {
                console.log('progress', arguments);
    
                bar.max = e.total;
                bar.value = e.loaded;
            },
    
            loadEnd: function (e) {
                console.log('loadEnd', arguments);
    
                bar.max = e.total;
                bar.value = e.loaded;
            },
    
            completeAll: function () {
                console.log('completeAll', arguments);
    
                setTimeout(function () {
                    bar.setAttribute('hidden', 'hidden');
                }, 1000);
    
                alert('Upload Completed');
            }
    
        });
    
    </script>
    

JavaScript

To create select and drop upload listeners, you need to instantiate each upload class with the target element and options, which define callbacks and useful settings.

<script>

    var bar = document.getElementById('js-progressbar');

    UIkit.upload('.js-upload', {

        url: '',
        multiple: true,

        beforeSend: function (environment) {
            console.log('beforeSend', arguments);

            // The environment object can still be modified here. 
            // var {data, method, headers, xhr, responseType} = environment;

        },
        beforeAll: function () {
            console.log('beforeAll', arguments);
        },
        load: function () {
            console.log('load', arguments);
        },
        error: function () {
            console.log('error', arguments);
        },
        complete: function () {
            console.log('complete', arguments);
        },

        loadStart: function (e) {
            console.log('loadStart', arguments);

            bar.removeAttribute('hidden');
            bar.max = e.total;
            bar.value = e.loaded;
        },

        progress: function (e) {
            console.log('progress', arguments);

            bar.max = e.total;
            bar.value = e.loaded;
        },

        loadEnd: function (e) {
            console.log('loadEnd', arguments);

            bar.max = e.total;
            bar.value = e.loaded;
        },

        completeAll: function () {
            console.log('completeAll', arguments);

            setTimeout(function () {
                bar.setAttribute('hidden', 'hidden');
            }, 1000);

            alert('Upload Completed');
        }

    });

</script>

Component options

Any of these options can be applied to the component attribute. Separate multiple options with a semicolon. Learn more

Option Value Default Description
url String '' The request url.
multiple Boolean false Allow multiple files to be uploaded.
name String files[] The name parameter.
type String POST The request type.
params Object {} Additional parameters.
allow String false File name filter. (eg. *.png)
mime String false File MIME type filter. (eg. image/*)
concurrent Number 1 Number of files that will be uploaded simultaneously.
type String `` The expected response type
method String POST The request method
msg-invalid-mime String Invalid File Type: %s Invalid MIME type message.
msg-invalid-name String Invalid File Name: %s Invalid name message.
cls-dragover String uk-dragover File name filter.
abort Function null The abort callback.
before-all Function null The beforeAll callback.
before-send Function null The beforeSend callback.
complete Function null The complete callback.
complete-all Function null The completeAll callback.
error Function null The error callback.
load Function null The load callback.
load-end Function null The loadEnd callback.
load-start Function null The loadStart callback.
progress Function null The progress callback.
fail Function alert The fail callback. If name or MIME type are invalid.

JavaScript

Learn more about JavaScript components.

Initialization

UIkit.upload(element, options);

Events

The following events will be triggered on elements with this component attached:

Name Description
upload Fires before files are being uploaded.