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The File Input component for Retool Apps

An input field to select single or multiple files.

The maximum size for uploaded files is 40MB.

Settings

File Input includes the following configurable options when building apps in the IDE.

File typesAppend newly selected filesCustom ruleDisabledEvent handlersForm data keyHide validation messageSuffix iconPrefix iconShow on desktopShow on mobileMake file public on uploadLabelAlignmentLabelsPositionWidthWidth (units)Allow wrappingLoadingMaintain space when hiddenMarginMax itemsMax sizeMin itemsMax sizeParse filesPlaceholderRequiredSelection typeReplace file with same nameShow clear buttonAlways show in edit modeStylesSuffix textPrefix textHelper textUpload file to Retool StorageValue

Properties

All properties for File Input with supported data types or values. You can write JavaScript almost anywhere in Retool to manipulate or read property values.

accept

string[]

A list of file extensions or file-type specifiers to accept.


Whether to append additional files to the value.


The custom validation message to display if the invalid is true.


Whether input, interaction, selection, or triggering is disabled.


events

object[]

A list of configured event handlers that trigger actions or queries.

Properties

event

enum

The event type.

Values
change

A user changes the value.

click

A user clicks or taps the component.

submit

A user submits the value.

focus

A user selects the input field.

blur

A user deselects the input field.

scan

A user scans a barcode.

open

A user opens the component.

close

A user closes the component.

true

A user sets the value to true.

false

A user sets the value to false.

select

A user selects a value.

clear

A user clears the value.

upload

A user uploads a file.

parse

An uploaded file is parsed.

inputValueChange

A user changes the value of the input field.


method

enum

The JavaScript method to perform when type is datasource, widget, state, or localStorage.


The type of action to perform.

Values
datasource

Control query.

widget

Control component.

script

Run script.

state

Set variable.

localStorage

Set localStorage.

util

Perform utility action (e.g., Open URL or Confetti).



files

Deprecated
object[]

A list of metadata from the selected files. Includes name, type, size, and lastModified.


The key used by a Form component to assign default values to input fields using form.initialData, and to construct the form.data property.


global

boolean

Whether the object is globally scoped for use in all app pages.


boolean

Whether the component is visible.


Whether to hide the validation message if the invalid is true.


The suffix icon to display.

Values

You can select an icon or dynamically set one with a valid icon key.


The prefix icon to display.

Values

You can select an icon or dynamically set one with a valid icon key.


id

string

The unique identifier.


invalid

boolean

Whether the value has failed any validation rules.


Whether the component is visible in the desktop layout.


Whether the component is visible in the mobile layout.


Whether to make the file public when uploading with Retool Storage.


label

string

The text label to display.


The horizontal alignment of the label.

Values
left

Left of the input field.

top

Above the input field.


The label for the node.


The position of the label relative to the input field or value.

Values
top

Above the input field or value.

left

Left of the input field or value.


The label width, in the unit specified in labelWidthUnit.


The specified units for labelWidth, if labelPosition is left.

Values
%

Percent.

px

Pixels.

col

Columns.


Whether the label can wrap to multiple lines.


loading

boolean

Whether to display a loading indicator.


Whether the component takes up space on the canvas if hidden is true.


The amount of margin to render outside.

Values
4px 8px

Normal margin.

0

No margin.


The maximum number of items to allow.


The maximum file size allowed.


The minimum number of items to allow.


The minimum file size allowed.


parsedValue

The parsed value of the input.


Whether to parse plain-text content.


parsing

boolean

Whether content is being parsed.


The text to display within the input field when there is no value.


pluginType

string

The plugin type.


Whether a value is required.


The type of file selection.

Values
single

Select a single file.

multiple

Select multiple files.

directory

Select a directory of files.


Whether to replace a file with the same name when uploading with Retool Storage.


Whether to display a button to clear the value of the input field.


Whether to remain visible in the editor if hidden is true.


style

object

Custom style options in use. Not all style options may be available for all components.


The suffix text to display.


The prefix text to display.


The tooltip text to display.


Whether to upload a file to Retool Storage.


validationMessage

string

The validation message to display if invalid is true.


value

object[]

A list of uploaded files.

Properties

base64Data

string

The base64 encoded data of the item.


sizeBytes

number

The size of the item in bytes.


type

string

The MIME type.



Methods

JavaScript API methods for interacting with File Input. You can write JavaScript almost anywhere in Retool and use methods to manipulate data and property values.

clearValidation

Clear the validation message from the input field.

fileInput.clearValidation()

clearValue

Clear the current values.

fileInput.clearValue()

focus

Set focus on the input field.

fileInput.focus()

resetValue

Reset the current value to the default value.

fileInput.resetValue()

scrollIntoView

Scrolls the canvas or parent container so that the selected component appears in the visible area.

fileInput.scrollIntoView(scrollIntoViewOptions)
Parameters

scrollIntoViewOptions

object

The scroll options.

Properties

behavior

enum

The scroll behavior.

Values
auto

Scroll immediately to the specified position.

smooth

Scroll gradually to the specified position.


block

enum

The scroll position relative to the component.

Values
nearest

Scrolls only the minimum amount required for the component to appear in the visible area. Scrolling does not occur if the component is already in view.

start

Scrolls to position the component at the top of the visible area.

center

Scrolls to position the component in the middle of the visible area.

end

Scrolls to position the component at the bottom of the visible area.




setDisabled

Set the disabled value to toggle whether the input field is disabled. Defaults to true without a parameter.

fileInput.setDisabled(disabled)
Parameters

Whether input, interaction, selection, or triggering is disabled.



setHidden

Set the hidden value to toggle whether the component is visible. Defaults to true without a parameter.

fileInput.setHidden(hidden)
Parameters

boolean

Whether the component is visible.



Events

Events are triggered by user interactions, such as clicking a button or entering a value. Use event handlers to trigger queries or other actions in response to events.

change

The value is changed.


parse

Data is parsed.