@launchdarkly/react-native-client-sdk/dist/src/hooks/variation/useTypedVariation.js

React Native LaunchDarkly SDK

import useLDClient from '../useLDClient';
/**
 * Determines the strongly typed variation of a feature flag.
 *
 * @param key The unique key of the feature flag.
 * @param defaultValue The default value of the flag, to be used if the value is not available
 *   from LaunchDarkly.
 * @returns
 *   The strongly typed value.
 */
export const useTypedVariation = (key, defaultValue) => {
    const ldClient = useLDClient();
    switch (typeof defaultValue) {
        case 'boolean':
            return ldClient.boolVariation(key, defaultValue);
        case 'number':
            return ldClient.numberVariation(key, defaultValue);
        case 'string':
            return ldClient.stringVariation(key, defaultValue);
        case 'undefined':
        case 'object':
            return ldClient.jsonVariation(key, defaultValue);
        default:
            return ldClient.variation(key, defaultValue);
    }
};
/**
 * Determines the strongly typed variation of a feature flag for a context, along with information about
 * how it was calculated.
 *
 * The `reason` property of the result will also be included in analytics events, if you are
 * capturing detailed event data for this flag.
 *
 * If the flag variation does not have the specified type, defaultValue is returned. The reason will
 * indicate an error of the type `WRONG_KIND` in this case.
 *
 * For more information, see the [SDK reference
 * guide](https://docs.launchdarkly.com/sdk/features/evaluation-reasons#react-native).
 *
 * @param key The unique key of the feature flag.
 * @param defaultValue The default value of the flag, to be used if the value is not available
 *   from LaunchDarkly.
 * @returns
 *  The result (as an {@link LDEvaluationDetailTyped<T>}).
 */
export const useTypedVariationDetail = (key, defaultValue) => {
    const ldClient = useLDClient();
    switch (typeof defaultValue) {
        case 'boolean':
            return ldClient.boolVariationDetail(key, defaultValue);
        case 'number':
            return ldClient.numberVariationDetail(key, defaultValue);
        case 'string':
            return ldClient.stringVariationDetail(key, defaultValue);
        case 'undefined':
        case 'object':
            return ldClient.jsonVariationDetail(key, defaultValue);
        default:
            return ldClient.variationDetail(key, defaultValue);
    }
};
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