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Number Input

The Number Input component provides users with a field for integer values, and buttons to increment or decrement the value.

NumberInput API

Import

import { Unstable_NumberInput as NumberInput } from '@mui/base/Unstable_NumberInput';
// or
import { Unstable_NumberInput as NumberInput } from '@mui/base';
Learn about the difference by reading this guide on minimizing bundle size.

Props

Props of the native component are also available.

NameTypeDefaultDescription
defaultValuenumber

The default value. Use when the component is not controlled.

disabledbool

If true, the component is disabled. The prop defaults to the value (false) inherited from the parent FormControl component.

endAdornmentnode

Trailing adornment for this input.

errorbool

If true, the input will indicate an error by setting the aria-invalid attribute on the input and the baseui--error class on the root element.

idstring

The id of the input element.

maxnumber

The maximum value.

minnumber

The minimum value.

onChangefunc

Callback fired after the value is clamped and changes - when the input is blurred or when the stepper buttons are triggered. Called with undefined when the value is unset.

Signature:function(event: React.FocusEvent | React.PointerEvent | React.KeyboardEvent, value: number | undefined) => void
  • event The event source of the callback
  • value The new value of the component
onInputChangefunc

Callback fired when the input value changes after each keypress, before clamping is applied. Note that event.target.value may contain values that fall outside of min and max or are otherwise "invalid".

Signature:function(event: React.ChangeEvent) => void
  • event The event source of the callback.
placeholderstring

The short hint displayed in the input before the user enters a value.

readOnlyboolfalse

If true, the input element becomes read-only. The stepper buttons remain active, with the addition that they are now keyboard focusable.

requiredbool

If true, the input element is required. The prop defaults to the value (false) inherited from the parent FormControl component.

shiftMultipliernumber

Multiplier applied to step if the shift key is held while incrementing or decrementing the value. Defaults to 10.

slotProps{ decrementButton?: func
| object, incrementButton?: func
| object, input?: func
| object, root?: func
| object }
{}

The props used for each slot inside the NumberInput.

slots{ decrementButton?: elementType, incrementButton?: elementType, input?: elementType, root?: elementType }{}

The components used for each slot inside the InputBase. Either a string to use a HTML element or a component.

See Slots API below for more details.

startAdornmentnode

Leading adornment for this input.

stepnumber

The amount that the value changes on each increment or decrement.

valuenumbernull

The current value. Use when the component is controlled.


The ref is forwarded to the root element.

Slots

To learn how to customize the slot, check out the Overriding component structure guide.

Slot nameClass nameDefault componentDescription
root.base-NumberInput-root'div'The component that renders the root.
input.base-NumberInput-input'input'The component that renders the input.
incrementButton.base-NumberInput-incrementButton'button'The component that renders the increment button.
decrementButton.base-NumberInput-decrementButton'button'The component that renders the decrement button.

CSS classes

These class names are useful for styling with CSS. They are applied to the component's slots when specific states are triggered.

Class nameDescription
.base--disabledClass name applied to the root element if disabled={true}.
.base--errorState class applied to the root element if error={true}.
.base--focusedClass name applied to the root element if the component is focused.
.base--readOnlyState class applied to the root element if readOnly={true}.
.base-NumberInput-adornedEndClass name applied to the root element if endAdornment is provided.
.base-NumberInput-adornedStartClass name applied to the root element if startAdornment is provided.
.base-NumberInput-formControlClass name applied to the root element if the component is a descendant of FormControl.