Rating

A row of stars you can read or set. Read-only it shows a score; interactive it is an input — tap a star for a whole value, or with precision={0.5} press the left half of a star for a half. Partial fills are drawn by clipping a filled star over an empty one of the same shape, so a half star is exactly half. The fill is animated on the UI thread: setting a value springs the stars to it, and a drag follows the finger without a spring so it never lags.

Installation

Rating ships with the library — no separate install.

import { Rating } from 'panelui-native';

Or copy the source into your project, to own and edit it:

npx panelui-cli@latest add rating

Usage

<Rating defaultValue={3} />
<Rating value={score} onValueChange={setScore} />
<Rating value={4.5} precision={0.5} readOnly />
<Rating label="Rate your stay" showValue defaultValue={0} />

Examples

Controlled

Hold the value in state and read it back.

const [score, setScore] = useState(3);

<Rating value={score} onValueChange={setScore} />

Half stars

precision={0.5} lets the left half of a star mean a half — the fill follows in half-star steps.

<Rating precision={0.5} defaultValue={2.5} />

Read-only display

readOnly shows any fractional value at full precision and takes no touches, so it reads a computed average as-is. The row is announced as an image.

<Rating value={4.3} precision={0.5} readOnly />

With a caption row

label and showValue draw a row above the stars, and the label doubles as the accessibility label.

<Rating label="Rate your stay" showValue defaultValue={0} />

Clearable and haptic

allowClear lets a second tap on the current value reset it to zero; haptics ticks as a drag crosses each star. Haptics need the optional expo-haptics and are silent without it.

<Rating defaultValue={4} allowClear haptics />

Ten stars

max sets how many stars; the whole control scales from the star size.

<Rating max={10} defaultValue={7} size="sm" />

Disabled

<Rating defaultValue={3} disabled />

Variants

`size`

sm
md (default)
lg

<Rating size="sm" defaultValue={3} />
<Rating size="md" defaultValue={3} />
<Rating size="lg" defaultValue={3} />

API Reference

Prop	Type	Default	Description
`className`	`string`	—
`value`	`number`	—	Controlled value. Leave unset and pass `defaultValue` to run uncontrolled.
`defaultValue`	`number`	`0`	Starting value when uncontrolled.
`max`	`number`	`5`	How many stars.
`precision`	`number`	`1`	Smallest step a tap can pick, as a fraction of a star. `1` is whole stars, `0.5` lets the left half of a star mean a half. Reading a value renders any precision — this only constrains what a finger can set.
`onValueChange`	`(value: number) => void`	—	Fires as the value changes, including live while dragging.
`onValueCommit`	`(value: number) => void`	—	Fires once when a tap or drag ends — the place for expensive side effects.
`readOnly`	`boolean`	`false`	Show the stars but ignore touches — the display half of the component.
`disabled`	`boolean`	`false`
`allowClear`	`boolean`	`false`	Let a second tap on the current value clear it back to zero, so a rating given by mistake can be taken back without a separate control.
`color`	`RatingColor`	`'warning'`	Which token the filled stars are painted with.
`label`	`string`	—	Caption above the stars. Also becomes the accessibility label.
`showValue`	`boolean`	`false`	Show the numeric value on the caption row, opposite the label.
`formatValue`	`(value: number) => string`	—	Format the shown value. Defaults to the number as written.
`haptics`	`boolean`	`false`	A tick under the finger each time a drag crosses onto a new star. Off by default — needs the optional `expo-haptics`, and is silent without it.
`headerClassName`	`string`	—	Extra classes for the caption row.
`rowClassName`	`string`	—	Extra classes for the row of stars.

Every part also accepts the underlying React Native props (ViewProps or TextProps) and a className for Tailwind utilities.

Notes

Runs controlled (value + onValueChange) or uncontrolled (defaultValue). onValueChange fires live while dragging; onValueCommit fires once when the tap or drag ends — reach for it when the change is expensive.

precision only constrains what a finger can set; a read value renders at any precision, so a computed 4.3 average shows four-and-a-bit stars even though a tap can only pick whole or half stars. Set readOnly for a pure display and the row is announced as an image rather than an adjustable control; set allowClear to let a second tap on the current value reset it to zero.

Rating

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