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  • The Upload widget lets users browse and select a local file, which you can then upload to the server.

    Notes:

    • Users can drag a file to the Upload widget in most modern browsers. However, they can't do it in Internet Explorer 11, as that browser doesn't support drag-and-drop.

    • The widget can handle files up to 250MB. Larger files might not be loaded properly and end up empty, with a file size of 0 bytes.

    Properties

    Name Description Mandatory Default value Observations
    Name Identifies an element in the scope where it is defined, like a screen, action, or module. Yes
    File Content Holds the file selected by the user. Yes
    File Name Holds the name of the file.
    Accept Specifies the type of UI placeholder. The placeholder hints the expected input type. Yes Image The possible values are: Image, Video, Any.
    Mandatory Boolean literal or expression that defines if the widget is required. Yes False
    Style Classes Specifies one or more style classes to apply to the widget. Separate multiple values with spaces. "upload" When Accept has the value Image, an additional class 'upload-image-withoverlay' is added to this property.
    Attributes
    Property Name of an attribute to add to the HTML translation for this element. You can pick a property from the drop-down list or type a free text. The name of the property will not be validated by the platform.

    Duplicated properties are not allowed. Spaces, " or ' are also not allowed.
    Value Value of the attribute. You can type the value directly or write expressions using the Expression Editor.

    If the Value is empty, the corresponding HTML tag is created as property="property". For example, the nowrap property does not require a value, therefore nowrap="nowrap" is added.

    Events

    Name Description Mandatory Observations
    On Change Screen action to be executed or a screen to navigate to when the value of the element changes.
    Transition Transition effect applied when navigating to another screen. By default defined at module level.
    Event JavaScript or custom event to be handled.
    Handler JavaScript event handler.

    Runtime Properties

    Name Description Read Only Type Observations
    Id Identifies the widget instance at runtime (HTML 'id' attribute). You can use it in JavaScript and Extended Properties. Yes Text
    Valid False when required inputs are not present or the input value does not comply with the defined data type. You can override this property value when performing custom validations. Boolean
    ValidationMessage Message describing the built-in validation constraints not satisfied when 'Valid' is False. You can override this property value when performing custom validations. Text
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