Feature values always have type string when using local evaluation mode

enableLocalEvaluation が true のときに getEnvironmentFlags() と getFlag() によって実行される Flagsmith クライアントのパスから始め、提供された TypeScript スクリプトを使って異なる値の型を再現します。ローカル評価の結果と API の結果を比較し、数値の feature 値がどちらのモードでも数値型を保持していることを確認します。

We've started seeing an issue where number values like this one are being returned as type string when enableLocalEvaluation is set to true.

Using this test script I've validated that the local evaluation causes the change in behaviour (thanks Matt for the help 🙌 )

This has been tested on flagsmith-nodejs versions 2.5.1 and 3.2.0

import Flagsmith from 'flagsmith-nodejs';

async function main(): Promise<void> {
    const flagClient = new Flagsmith({
        environmentKey: 'ser.key',
        enableLocalEvaluation: true,
        enableAnalytics: false,
    });

    const environmentFlags = await flagClient.getEnvironmentFlags();
    const flag = environmentFlags.getFlag('daisy.settlements.timeout');
    console.log(`flagClient.apiUrl=${flagClient.apiUrl}`);
    console.log(`flagClient.enableLocalEvaluation=${flagClient.enableLocalEvaluation}`);
    console.log(JSON.stringify(flag));
    console.log(`typeof flag.value=${typeof flag.value}`);

    await flagClient.close();
}

void main();

enableLocalEvaluation=true

flagClient.apiUrl=https://edge.api.flagsmith.com/api/v1/
flagClient.enableLocalEvaluation=true
{"value":"60000","enabled":true,"isDefault":false,"featureId":62178,"featureName":"daisy.settlements.timeout"}
typeof flag.value=string

enableLocalEvaluation=false

flagClient.apiUrl=https://edge.api.flagsmith.com/api/v1/
flagClient.enableLocalEvaluation=false
{"value":60000,"enabled":true,"isDefault":false,"featureId":62178,"featureName":"daisy.settlements.timeout"}
typeof flag.value=number