Form

The @uppy/form plugin has several features to integrate with HTML <form> elements.

  • It collects user-specified metadata from form fields, right before Uppy begins uploading/processing files.
  • It can append upload results back to the form as a hidden field. Currently the appended result is a stringified version of a result returned from uppy.upload() or complete event.
const Form = require('@uppy/form')

uppy.use(Form, {
  // Options
})

Installation

This plugin is published as the @uppy/form package.

Install from NPM:

npm install @uppy/form

In the CDN package, it is available on the Uppy global object:

const Form = Uppy.Form

Options

The @uppy/form plugin has the following configurable options:

uppy.use(Form, {
  target: null,
  getMetaFromForm: true,
  addResultToForm: true,
  resultName: 'uppyResult',
  triggerUploadOnSubmit: false,
  submitOnSuccess: false
})

id: 'Form'

A unique identifier for this plugin. It defaults to 'Form'.

target: null

DOM element or CSS selector for the form element. This is required for the plugin to work.

getMetaFromForm: true

Configures whether or not to extract metadata from the form. When set to true, the Form plugin will extract all fields from a <form> element before upload begins. Those fields will then be added to global uppy.state.meta and each file’s meta, and appended as (meta)data to the upload in an object with [file input name attribute] -> [file input value] key/values.

addResultToForm: true

Configures whether or not to add upload/encoding results back to the form in an <input name="uppyResult" type="hidden"> element.

resultName: 'uppyResult'

The name attribute for the <input type="hidden"> where the result will be added.

triggerUploadOnSubmit: false

Configures whether or not to start the upload when the form is submitted. When the user presses a submit button, this will prevent form submission, and instead upload files. You can then:

  • use submitOnSuccess: true if you need the form to actually be submitted once all files have been uploaded.
  • listen for uppy.on('complete') to do something else if the file uploads are all you need. For example, if the form is used for file metadata only.

submitOnSuccess: false

Configures whether or not to submit the form after Uppy finishes uploading/encoding.