---
title: Resource Group Header Render Hooks
---

In resource timeline view, a resource group "header" is where a group's name is displayed, at the top of each row group.

`resourceGroupHeaderClass` - a [ClassName Input](classname-input)

`resourceGroupHeaderInnerClass` - a [ClassName Input](classname-input) for the inner wrapper of the resource-group header cell

`resourceGroupHeaderContent` - a [Content Injection Input](content-injection)

`resourceGroupHeaderDidMount`

`resourceGroupHeaderWillUnmount`


## Argument

When the above hooks are specified as a function in the form `function(arg)`, the `arg` is an object with the following properties:

- `fieldValue` - the value of the group field
- `el` - the element. only available in `resourceGroupHeaderDidMount` and `resourceGroupHeaderWillUnmount`