The step input control allows the user to change the input values in predefined increments (steps).
Use the step input if:
- The user needs to adjust amounts, quantities, or other values quickly.
- The user needs to adjust values for a specific step (for example, in a shopping cart).
Do not use the step input if:
- The user needs to enter a static number (for example, postal code, phone number, or ID). In this case, use the regular input field control instead.
- You want to display a value that rarely needs to be adjusted and does not pertain to a particular step. In this case, use the regular input field control instead.
- You want the user to enter dates and times. In this case, use the date picker, date range selection, time picker, or date/time picker instead.
Size S and M (Smartphone and Tablet)
On smartphones and tablets, the step input is shown in cozy mode. When the focus is in the input field, the keyboard layout for numeric input is displayed.
Size L (Desktop)
On desktop devices, the step input is shown in compact mode.
For more information on the cozy and compact modes, see content density.
The step input always contains a value. When no value is set, the default value is generally 0. However, app developers can set a different default value (property: value).
If the minimum value is larger than 0, the generic value is the minimum value set by the app team.
Changing the Value
The user changes the value:
- By pressing the increase/decrease buttons
- By typing a number
- With keyboard shortcuts (up/down, page up/down)
- With the mouse scroll wheel
On desktop devices, clicking the input field places the cursor in the input field. On mobile devices, tapping the input field displays the numeric keyboard.
Clicking the buttons changes the value by a step and does not place the caret in the input field.
When the user clears the value and leaves the input field, the value in the field becomes 0 or the minimum if the minimum is larger than 0.
If the user enters an invalid value, the invalid value remains in the input field. An error state is displayed.
Increasing the Step
To allow the user to change values by a larger step with keyboard shortcuts, app developers can set a multiple of the step (property: largerStep). The default value is two times the set step.
Always provide a meaningful label for the step input.
By default the width of the step input is set to 100% of the container. Avoid setting a fixed width, but rather embed the control in a proper layout such as a form, simple form, or grid layout, and use the layout data property where the width is defined by the 12-column approach to define the responsive behavior for sizes S, M, and L.
When used in forms, the width of the step input control comes from the label:field ratio of the form. The app development team should be able to restrict the width to a proper number of columns (12-grid responsive layout) so that the step input is not too wide.
Ensure an appropriate width for the range of values to be entered for all the sizes S, M, and L. Avoid a larger width than necessary.
Keep in mind the varying lengths of decimals. Limit the number of digits after the floating point if possible in your use case. For more information, have a look at the article on formatting numbers.
Sets the minimum possible value of the defined range.
Sets the maximum possible value of the defined range.
Increases/decreases the value of the input. The step can be a floating-point value.
Increases/decreases the value with a larger value than the set step (only when using keyboard shortcuts). The default value is two times larger than the set step.
Determines the value of the step input. App developers can set default initial value.
Determines the width of the control.
The step input control offers the four value states listed below. For the error and warning states, you can show an additional value state text when the focus is on the input field.
- None (default): No value state message is shown
- Success: No value state message is shown
Editable and Enabled States
Property settings: editable = true, enabled = true
The step input control is enabled and editable by default. Set the control to editable to allow the user to enter a value.
Property settings: editable = false, enabled = true
Use this state, for example, to display data only.
Property settings: editable = not relevant, enabled = false
Set the control to disabled in an edit scenario to indicate that the user cannot change the control, for example, due to missing access rights or previous conditions not having been fulfilled or selected.