react-kiwi-dropdown

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react-kiwi-dropdown

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A minimal, easy-to-use and highly adjustable ReactJS dropdown.

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# ![alt text](https://raw.githubusercontent.com/KiTiVi/react-kiwi-dropdown/master/icons8-kiwi-80.png) react-kiwi-dropdown

A minimal, easy-to-use and highly adjustable dropdown component made with ReactJS.

## Why?

Styling \<select> and \<option> elements is a hassle when creating a custom dropdown.
Many UI component libraries have great dropdown components but these are often heavily styled and not easy to overwrite. **react-kiwi-dropdown** is an easy to use dropdown component which makes overwriting default styles a breeze.

## Usage

```javascript
import React, { useState } from 'react'
import Dropdown from 'react-kiwi-dropdown'

const [selectedOption, setSelectedOption] = useState('')

const options = [
  { value: 'kiwi', content: '🥝' },
  { value: 'banana', content: '🍌' },
  { value: 'pineapple', content: '🍍' }
]

const onChange = option => {
  if (option.value === selectedOption) {
    setSelectedOption('')
  } else {
    setSelectedOption(option.value)
  }
}

return (
  <Dropdown
    options={options}
    onChange={onChange}
    buttonIndicator
    resetValue={''}
    selectedOption={selectedOption}
  />
)
```

## Props

There's only two required props, **options** and **onChange**.

| Name                   | Type                      | Description                                                                          |
| ---------------------- | ------------------------- | ------------------------------------------------------------------------------------ |
| options                | array                     | An array containing option objects                                                   |
| selectedOption         | string / array of strings | The currently selected value/values                                                  |
| resetValue             | any                       | Used to reset select with button indicator                                           |
| onChange               | function                  | The dropdown will call this function on change and return the selected option object |
| buttonLabel            | string                    | Button label                                                                         |
| buttonIndicator        | boolean                   | Show button indicator                                                                |
| buttonIndicatorContent | any                       | Custom content inside button indicator                                               |
| buttonArrow            | 'single' or 'double'      | Arrow style, single or double                                                        |
| selectedOptionIcon     | any                       | Custom icon for selected option                                                      |

## Option object

| Name    | Type   | Description        | Required |
| ------- | ------ | ------------------ | -------- |
| value   | string | Option value       | required |
| content | any    | Content to display | required |
| icon    | any    | Any component      |

## Button indicator

The button indicator indicates if a value is selected and alo deselect all values if it's clicked while the dropdown is closed.
Button indicator requires the prop **resetValue**. This value will be sent back when it deselects all values.

## Styling

The dropdown can easily be styled by extending the component with styled-components **styled()** function.
Use predefined classNames to add style to specific components.

| className              | Description              | Selected className |
| ---------------------- | ------------------------ | ------------------ |
| .KIWI-button           | Button to toggle options |                    |
| .KIWI-button-indicator | Button indicator         | .selected          |
| .KIWI-option-list      | Option list              |                    |
| .KIWI-option           | Option                   | .selected          |

## Default style

react-kiwi-dropdown comes with a miniminimalistic design and few lines of css.

```css
.KIWI-button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 40px;
  padding: 8px;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  font-size: 14px;
}

.KIWI-button:focus {
  outline: none;
}

.KIWI-button-indicator {
  display: inline-block;
  min-height: 16px;
  min-width: 16px;
  border: 1px solid rgba(0, 0, 0, 0.25);
  margin-right: 7.5px;
}

.KIWI-option-list {
  position: absolute;
  list-style: none;
  margin: 0;
  padding: 0;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.KIWI-option {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 8px;
  background: #fff;
  border: none;
  position: relative;
  font-size: 12px;
}

.option:hover {
  text-shadow: 0 0 0.65px #333, 0 0 0.65px #333;
}

.option .selected {
  text-shadow: 0 0 0.65px #333, 0 0 0.65px #333;
}
```

## Extending styles

Styles can easily be extended by either overwriting the predefined ids and classes or by using the **styled()** function from styled-components.

### styled-components example

```javascript
const StyledDropdown = styled(Dropdown)`
  .KIWI-button {
    background: red;
  }

.KIWI-button-indicator {
    background: green;

&.selected {
      background: pink;
    }
  }

.KIWI-option-list {
    background: yellowgreen;
    padding: 5px;
  }

.KIWI-option {
    background: lightcoral;

&.selected {
      background: blue;
    }
  }
`
```

## Examples

https://react-kiwi-dropdown.netlify.com/

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