Menu
Open source
Client.decr(key)
Decrements the number stored at key
by one. If the key does not exist, it is set to zero before performing the operation.
Parameters
Parameter | Type | Description |
---|---|---|
key | string | the key to decrement. |
Returns
Type | Resolves with | Rejected when |
---|---|---|
Promise<number> | On success, the promise resolves with the value of key after the decrement. | If the key contains a value of the wrong type, or contains a string that cannot be represented as an integer, the promise is rejected with an error. |
Example
JavaScript
import redis from 'k6/experimental/redis';
// Instantiate a new redis client
const redisClient = new redis.Client('redis://localhost:6379');
export default async function () {
await redisClient.set('mykey', 10, 0);
let value;
value = await redisClient.incr('mykey');
value = await redisClient.incrBy('mykey', value);
value = await redisClient.decrBy('mykey', value);
value = await redisClient.decr('mykey');
if (value !== -1) {
throw new Error('mykey should have been -1');
}
}
Was this page helpful?
Related documentation
Related resources from Grafana Labs
Additional helpful documentation, links, and articles:
Video
Performance testing and observability in Grafana Cloud
In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing.
User-centered observability: load testing, real user monitoring, and synthetics
Learn how to use load testing, synthetic monitoring, and real user monitoring (RUM) to understand end users' experience of your apps. Watch on demand.