Limit size of a data field in kibana

Hi all,

I'm trying to restrict value of data entry(value) of my field to 30 characters in my kibana visualizations

I think there is some advanced json method by painless to do this,but i'm unable to figure out command.

Any idea on how to go about this?

You can create a scripted field with type String with Format of Truncated String to do this.

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