kibana-123/src/ui/public/stringify/editors/truncate.html

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

<div class="form-group">
  <label>Field Length</label>
  <input ng-model="editor.formatParams.fieldLength" class="form-control">
</div>

<field-format-editor-samples inputs="editor.field.format.type.sampleInput"></field-format-editor-samples>