Barcode Component


Function: a!barcodeField()

Displays a field that allows entry of a barcode value using a barcode scanner or manual input.


Name Keyword Type Description
Label label Text Optional text to display as the field label.
Label Position labelPosition Text Optional text to determine where the label appears. Valid values include
  • "ABOVE" (default) Displays the label above the component.
  • "ADJACENT" Displays the label to the left of the component.
  • "COLLAPSED" Hides the label. The label will still be read by screen readers; see accessibility considerations for more information.
  • "JUSTIFIED" Aligns the label alongside the component starting at the edge of the page.
Instructions instructions Text Optional text to display below the field's value.
Help Tooltip helpTooltip Text Displays a help icon with the specified text as a tooltip. The tooltip displays a maximum of 500 characters. The help icon does not show when the label position is "COLLAPSED".
Placeholder placeholder Text Optional text to display in the field when it is empty. Does not show if the field is read only.
Accepted Types acceptedTypes Text Array Determines the types of barcodes that are accepted in the field. If no types are specified, then all types are accepted. Null results are accepted for all types. Valid values:
  • "CODE39"
  • "CODE93"
  • "CODE128"
  • "EAN8"
  • "EAN13"
  • "PDF417"
  • "QRCODE"
  • "UPCA"
  • "UPCE"
Display Value value Text Text to display in the field.
Save Input To saveInto Save Array One or more variables that are updated with the text when the user changes it. Use a!save() to save a modified or alternative value to a variable.
Refresh After refreshAfter Text Determines when the interface is refreshed with the saved value from the barcode field. Valid values are "KEYPRESS" to refresh after every character typed into the field and "UNFOCUS" (the default value) to refresh when the user deselects the field after changing its value.
Required required Boolean Determines if a value is required to submit the form. Default is false.
Required Message requiredMessage Text Custom message to be displayed when the field's value is required and not provided.
Read-only readOnly Boolean If set to true, prohibits users from editing the value. Default is false.
Disabled disabled Boolean Determines if the user is prevented from changing the value. Default is false.
Validations validations Text Array Validation errors to be displayed below the field when the value is not null.
Validation Group validationGroup Text When present, this field is only validated when a button in the same validation group is clicked.
Alignment align Text Alignment of the value. Valid values are "LEFT", "CENTER", and "RIGHT". Appian recommends setting the alignment when used in an editable grid only.
Visibility showWhen Boolean Determines whether the component is displayed on the interface. When set to false, the component is hidden and is not evaluated. Default: true.


  • The native device's camera is used on mobile devices to scan barcodes.
  • The barcode component does not support barcode scanning on Appian's web user interfaces. Instead, users can manually enter barcode values.
  • Use the Accepted Types parameter to specify one or more type(s) of barcode.


Copy and paste an example into the INTERFACE DEFINITION in EXPRESSION MODE to see it displayed.

  label: "Product Barcode",
  instructions: "Scan a barcode from a product box"

Displays the following on Appian's web user interfaces:

And the following on iOS:

And the following on Android:

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