impact()

Play a haptic with a custom intensity value (0.0–1.0).

On iOS (Core Haptics), the intensity is applied precisely by CHHapticEngine. On Android it maps to VibrationEffect amplitude. On devices without haptic hardware this is a no-op.

Signature

function impact(
  type?: keyof typeof HapticFeedbackTypes | HapticFeedbackTypes,
  intensity?: number,
  options?: HapticOptions,
): void;

Parameters

Parameter	Type	Default	Description
type	HapticFeedbackTypes	'impactMedium'	Determines the base character (sharpness) of the feedback
intensity	number	0.7	Haptic strength from 0.0 (silent) to 1.0 (maximum)
options	HapticOptions	{}	Same options as trigger()

Examples

import HapticFeedback, {
  impact,
  HapticFeedbackTypes,
} from "react-native-haptic-feedback";

// Simple — uses default type and intensity
impact();

// Custom intensity
impact("impactHeavy", 0.3); // gentle heavy

// Named export
HapticFeedback.impact(HapticFeedbackTypes.rigid, 1.0);

Type-to-character mapping

The type parameter selects the characteristic sharpness of the feedback. The intensity parameter controls how strong it feels:

Type	Sharpness (iOS)	Character
impactLight	0.3	Soft, diffuse
impactMedium	0.6	Neutral
impactHeavy	0.8	Sharp, heavy
rigid	1.0	Crisp, mechanical
soft	0.1	Very diffuse
selection	0.3	Light, tick-like
Other types	0.5	Neutral

Platform notes

• iOS: Uses CHHapticEngine with precise intensity and sharpness parameters.
• Android: Maps to VibrationEffect.createWaveform with amplitude scaled from intensity. On API 33+ tagged with VibrationAttributes.USAGE_TOUCH.
• Web: Delegates to navigator.vibrate with a fixed duration (intensity is ignored — the Web Vibration API has no amplitude control).

vs trigger()

Use impact() when you need custom intensity. Use trigger() for the named, opinionated intensity presets built into each type.