# Quick start using Redis Insight

```json metadata
{
  "schema_version": 2,
  "title": "Quick start using Redis Insight",
  "description": "Get started with triggers and functions using Redis Insight",
  "categories": ["docs","develop","stack","oss","rs","rc","oss","kubernetes","clients"],
  "tableOfContents": {"sections":[{"id":"connect-to-redis-stack","title":"Connect to Redis Stack"},{"id":"load-a-library","title":"Load a library"},{"id":"uploading-an-external-file","title":"Uploading an external file"},{"id":"creating-triggers","title":"Creating triggers"}]}

,
  "codeExamples": []
}
```


Make sure that you have [Redis Stack installed](https://redis.io/docs/latest/operate/oss_and_stack/install/install-stack) and running. Alternatively, you can create a [free Redis Cloud account](https://redis.com/try-free/?utm_source=redisio&utm_medium=referral&utm_campaign=2023-09-try_free&utm_content=cu-redis_cloud_users).

If you haven't already installed Redis Insight, you can download the latest version [here](https://redis.com/redis-enterprise/redis-insight/?_ga=2.232184223.127667221.1704724457-86137583.1685485233&_gl=1*1gygred*_ga*ODYxMzc1ODMuMTY4NTQ4NTIzMw..*_ga_8BKGRQKRPV*MTcwNDkyMzExMC40MDEuMS4xNzA0OTI3MjQ2LjUyLjAuMA..*_gcl_au*MTQzODY1OTU4OS4xNzAxMTg0MzY0). If this is your first time using Redis Insight, you may wish to read through the [Redis Insight guide](https://redis.io/docs/latest/develop/tools/insight) before continuing with this guide.

## Connect to Redis Stack

Open the Redis Insight application, and connect to your database by clicking on its database alias.

![](https://redis.io/docs/latest/images/triggers-and-functions/tf-rdi-0.png)

## Load a library

Click on the triggers and functions icon and then on **+ Library** as shown below.

![](https://redis.io/docs/latest/images/triggers-and-functions/tf-rdi-1.png)

Add your code to the **Library Code** section of the right-hand panel and then click **Add Library**.

![](https://redis.io/docs/latest/images/triggers-and-functions/tf-rdi-2.png)

You'll see the following when the library was added:

![](https://redis.io/docs/latest/images/triggers-and-functions/tf-rdi-3.png)

The `TFCALL` command is used to execute the JavaScript Function. If the command fails, an error will be returned. Click on the **>_ CLI**  button in the lower left-hand corner to open a console window and then run the command shown below.

![](https://redis.io/docs/latest/images/triggers-and-functions/tf-rdi-3a.png)

To update a library you can edit the library code directly in the interface by clicking on the edit (pencil) icon. When you save your changes, the libary will be reloaded.

![](https://redis.io/docs/latest/images/triggers-and-functions/tf-rdi-4.png)

## Uploading an external file

Click on the **+ Add Library** button as before and, instead of adding the code directly into the editor, click on the **Upload** button, select the file from your file browser, and then click on **Add Library**. The file needs to contain the header, which contains the engine identifier, the API version, and the library name: `#!js api_version=1.0 name=myFirstLibrary`.

![](https://redis.io/docs/latest/images/triggers-and-functions/tf-rdi-5.png)

## Creating triggers

Functions within Redis can respond to events using keyspace triggers. While the majority of these events are initiated by command invocations, they also include events that occur when a key expires or is removed from the database.

For the full list of supported events, please refer to the [Redis keyspace notifications page](https://redis.io/docs/latest/develop/pubsub/keyspace-notifications#events-generated-by-different-commands/?utm_source=redis\&utm_medium=app\&utm_campaign=redisinsight_triggers_and_functions_guide).

The following code creates a new keyspace trigger that adds a new field to a new or updated hash with the latest update time.

```javascript
#!js name=myFirstLibrary api_version=1.0

function addLastUpdatedField(client, data) {
    if(data.event == 'hset') {
        var currentDateTime = Date.now();
        client.call('hset', data.key, 'last_updated', currentDateTime.toString());
    }
} 

// Register the KeySpaceTrigger 'AddLastUpdated' for keys with the prefix 'fellowship'
// with the callback function 'addLastUpdatedField'.
redis.registerKeySpaceTrigger('addLastUpdated', 'fellowship:', addLastUpdatedField);"
```

Update the existing library as before and then, using the Redis Insight console, add a new hash with the required prefix to trigger the function.

```Shell
> HSET fellowship:1 name "Frodo Baggins" title "The One Ring Bearer"
```

Run the [`HGETALL`](https://redis.io/docs/latest/commands/hgetall) command to check if the last updated time is added to the example.

```Shell
> HGETALL fellowship:1
1) "name"
2) "Frodo Baggins"
3) "title"
4) "The One Ring Bearer"
5) "last_updated"
6) "1693238681822"
```