Upload

Pick or drop a file. The file is exposed on the component’s value and through the fileReceived event, so a script can store it anywhere.

Reach for it when you need:

• Attaching a photo to a downtime record
• Importing a CSV for a pipeline to process

Component name: Upload · Category: Input

In the palette: Pick / drop a file — store it anywhere via its value or the fileReceived event

Properties

Any property can be bound to a tag, another component's property, or a query.

Property	Type	Default	Description
value	union	""	The file reference: a server URL (server mode) or an inline data URL (data mode). Bind this to a write Named Query param to store it. Array when 'multiple'.
storageMode	enum	server	server = upload to the sandboxed uploads folder and keep a URL; data = keep the file inline as a base64 data URL (small files only). Options: server · data.
folder	string	""	server mode: destination folder under the uploads root (e.g. invoices/2026). Supports {{bindings}}. Confined to the sandbox — it can't escape the uploads root.
multiple	boolean	false	Allow selecting several files (value becomes an array of references).
accept	string	""	Allowed file-type filter, e.g. image/*,.pdf. Blank = any.
maxSizeMB	number	25	Reject files larger than this many MB (0 = no widget limit). This can only TIGHTEN the platform limit set in Settings → Storage — the server enforces the global cap regardless.
dropzone	boolean	true	Show a large drag-and-drop area instead of a single button.
buttonLabel	string	Choose file	—
showPreview	boolean	true	Show image thumbnails for image files.
title	string	Upload	—
showTitle	boolean	true	—
titleSize	number	0	Title font size (px). 0 = follows the size. 1.0.8
size	enum	inherit	Field height, padding, text and title size. Project default = the project's Control size (Project settings → Theme). Use md or larger on touch panels. Options: inherit · xs · sm · md · lg · xl. 1.0.8
shadow	boolean	true	Show a subtle drop-shadow on the control. Turn off for a flat look.
disabled	boolean	false	—
style	style	{}	Custom CSS properties

Events

Attach event actions to these in the Event Manager.

Event	Label	Group	Payload
click	Click	Mouse	The DOM event.
dblclick	Double click	Mouse	The DOM event.
contextmenu	Right click	Mouse	The DOM event.
mouseenter	Mouse enter	Mouse	The DOM event.
mouseleave	Mouse leave	Mouse	The DOM event.
change	Change	Input	The DOM event.
submit	Submit	Input	The DOM event.
focus	Focus	Input	The DOM event.
blur	Blur	Input	The DOM event.
fileReceived	File received	Upload	context.file and context.files.

Right-click behaves differently in the Designer

contextmenu fires your configured actions at runtime only — in LiveView and in preview. On the Designer canvas the right-click is captured to open the Event Manager, so testing it there will not run your actions. Test right-click in preview.

Notes

Files saved with system.files.save land in the workspace uploads folder and come back with a URL usable by Image, PDF Viewer or Link.

A fileReceived handler reads the file as context.file (and every file picked, as context.files) — not as a bare file. The Event Manager now says so under the event. New in 1.0.8

Size New in 1.0.8

size sets the picker's height, padding, text and title on one scale shared by every field widget:

size	xs	sm	md	lg	xl
Field height	28 px	36 px	44 px	52 px	64 px
Text	12 px	13 px	14 px	16 px	18 px

The default, Project default (inherit), follows the project's Control size (Project settings → Theme), so one setting resizes every field on every screen. Set size on a widget only where it has to differ. A field, a dropdown and a button at the same size line up exactly, side by side.

titleSize now defaults to 0, which follows the size. A number you set still wins.

Fields, buttons and menus draw smaller after upgrading to 1.0.8

Before 1.0.8 these widgets had one size, what is now md (a 44 px field). The project's Control size defaults to sm (36 px), sized for desktop dashboards, and every widget whose size is Project default follows it — which is every widget in an upgraded project. On a touch panel, set Project settings → Theme → Control size to md or larger: 44 px is the touch-target minimum.

See also

• Scripting API