react-native/Libraries/Components/ScrollView/processDecelerationRate.js

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow
 */

'use strict';

const Platform = require('Platform');

function processDecelerationRate(
  decelerationRate: number | 'normal' | 'fast',
): number {
  if (decelerationRate === 'normal') {
    return Platform.select({
      ios: 0.998,
      android: 0.985,
    });
  } else if (decelerationRate === 'fast') {
    return Platform.select({
      ios: 0.99,
      android: 0.9,
    });
  }
  return decelerationRate;
}

module.exports = processDecelerationRate;