@blueprintjs/core/src/components/forms/control-group.md

@# Control group

A control group renders several distinct form controls as one unit, squaring the
borders between them. It supports any number of buttons, text inputs, input
groups, and HTML selects as direct children.

<div class="@ns-callout @ns-intent-success @ns-icon-comparison">
    <h4 class="@ns-heading">Control group vs. input group</h4>

Both components group multiple elements into a single unit, but their usage patterns are
quite different.

Think of `ControlGroup` as a parent with multiple children, with each one a separate
control.

Conversely, an `InputGroup` is a single control, and should function like so. A
button inside of an input group should only affect that input; if its reach is further, then it
should be promoted to live in a control group.

</div>

@reactExample ControlGroupExample

@## Flex layout

`ControlGroup` is a CSS inline flex row (or column if vertical) and provides
some modifer props for common flexbox patterns:

- Enable the `fill` prop on a control group to make all controls expand equally to
  fill the available space.
    - Controls will expand horizontally by default, or vertically if the `vertical` prop is enabled.
    - Add the class `Classes.FIXED` to individual controls to revert them to their initial sizes.

- In addition, you may enable the `fill` prop on specific controls inside the group to expand them
  fill more space while other controls retain their original sizes.

You can adjust the specific size of a control with the `flex-basis` or `width`
CSS properties.

@## Props

This component is a lightweight wrapper around its children. It supports all
HTML `<div>` props, in addition to those listed below.

```tsx
<ControlGroup fill={true} vertical={false}>
    <Button icon="filter">Filter</Button>
    <InputGroup placeholder="Find filters..." />
</ControlGroup>
```

@interface IControlGroupProps

@## CSS

A `.@ns-control-group` renders several distinct controls as one unit, squaring the borders between
them. It supports any number of `.@ns-button`, `.@ns-input`, `.@ns-input-group`, and `.@ns-select`
elements as direct children.

Note that `.@ns-control-group` does not cascade any modifiers to its children. For example, each
child must be marked individually as `.@ns-large` for uniform large appearance.

@css control-group