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FileInputField

FileInputField allows users to select files to upload.

Basic Usage

To implement the FileInputField component, you need to import it first:

import { FileInputField } from '@react-ui-org/react-ui';

And use it:

<FileInputField label="Attachment" />

See API for all available options.

General Guidelines

  • Apply native HTML attributes to control what and how many files users can select.

  • Use short and descriptive labels, ideally nouns rather than seemingly polite phrases like Please attach your file here. Short labels will help your users accomplish their task faster.

  • Only make the FileInputField's label invisible when there is another visual clue to guide users through filling the input.

  • When a short label is not enough, use help texts to guide users before they enter anything.

  • Use clear, calm error messages when there's a problem with what they entered. Be positive and focus on solutions to make the error message helpful.

👉 FileInputField implements native HTML input type="file". Therefore, it is not possible to affect neither its translations (they depend on a browser), nor appearance. Custom translations and appearance are considered to be implemented at some point in the future. However, from the layout perspective, FileInputFields work just like any other form fields.

Sizes

Full-width fields span the full width of a parent:

<FileInputField
  fullWidth
  label="First name"
/>

Invisible Label

In some cases, it may be convenient to visually hide the field label. The label remains accessible to assistive technologies.

While it may be acceptable for simple forms with just a few fields, it's dangerous to hide labels from users in most cases. Keep in mind you should provide another visual clue so users know what to fill into the input.

<FileInputField
  isLabelVisible={false}
  label="Attachment"
/>

Horizontal Layout

The default vertical layout is very easy to use and work with. However, there are situations where horizontal layout suits better — and that's why React UI supports this kind of layout as well.

<FileInputField
  label="Attachment"
  layout="horizontal"
/>
<FileInputField
  fullWidth
  isLabelVisible={false}
  label="Attachment"
  layout="horizontal"
/>

Help Text

You may provide an additional help text to clarify how the input should be filled.

<FileInputField
  helpText="Choose one or more files to upload."
  label="Attachment"
/>
<FileInputField
  helpText="Choose one or more files to upload."
  label="Attachment"
  layout="horizontal"
/>
<FileInputField
  fullWidth
  helpText="Choose one or more files to upload."
  label="Attachment"
  layout="horizontal"
/>

States

Validation States

Validation states visually present the result of validation of the input. You should always provide a validation message for states other than valid so users know what happened and what action they should take or what options they have.

<FileInputField
  label="Attachment"
  validationState="valid"
  validationText="Looks good!"
/>
<FileInputField
  label="Attachment"
  validationState="invalid"
  validationText="Your file is too big. Please select something smaller."
/>
<FileInputField
  label="Attachment"
  validationState="warning"
  validationText={`
    You selected more than 10 files.
    It may take some time before we process them.
  `}
/>

Disabled State

It's possible to disable the whole input.

<FileInputField
  disabled
  label="Attachment"
/>

Forwarding HTML Attributes

In addition to the options below in the component's API section, you can specify React synthetic events or you can add whatever HTML attribute you like. All attributes that don't interfere with the API are forwarded to the native HTML <input>. This enables making the component interactive and helps to improve its accessibility.

<FileInputField
  accept=".pdf,.jpg,.jpeg,.png"
  helpText={`
    Choose up to 10 files. Allowed extensions are .pdf, .jpg, .jpeg, or .png.
    Size limit is 10 MB.
  `}
  label="Attachment"
  multiple
/>

👉 Refer to the MDN reference for the full list of supported attributes of the file input type.

Forwarding ref

If you provide ref, it is forwarded to the native HTML <input> element.

API

Theming

Head to Forms Theming to see shared form theming options.