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83 lines
4.5 KiB
Markdown
83 lines
4.5 KiB
Markdown
---
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category: Components
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type: Data Entry
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title: Select
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---
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Select component to select value from options.
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## When To Use
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- A dropdown menu for displaying choices - an elegant alternative to the native `<select>` element.
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- Utilizing [Radio](/components/radio/) is recommended when there are fewer total options (less than 5).
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## API
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```html
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<Select>
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<Option value="lucy">lucy</Option>
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</Select>
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```
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### Select props
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| Property | Description | Type | Default |
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| -------- | ----------- | ---- | ------- |
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| allowClear | Show clear button. | boolean | false |
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| autoFocus | Get focus by default | boolean | false |
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| defaultActiveFirstOption | Whether active first option by default | boolean | true |
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| defaultValue | Initial selected option. | string\|number\|string\[]\|number\[] | - |
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| disabled | Whether disabled select | boolean | false |
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| dropdownClassName | className of dropdown menu | string | - |
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| dropdownMatchSelectWidth | Whether dropdown's with is same with select. | boolean | true |
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| dropdownStyle | style of dropdown menu | object | - |
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| filterOption | If true, filter options by input, if function, filter options against it. The function will receive two arguments, `inputValue` and `option`, if the function returns `true`, the option will be included in the filtered set; Otherwise, it will be excluded. | boolean or function(inputValue, option) | true |
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| firstActiveValue | Value of action option by default | string\|string\[] | - |
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| getPopupContainer | Parent Node which the selector should be rendered to. Default to `body`. When position issues happen, try to modify it into scrollable content and position it relative. [Example](https://codesandbox.io/s/4j168r7jw0) | function(triggerNode) | () => document.body |
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| labelInValue | whether to embed label in value, turn the format of value from `string` to `{key: string, label: ReactNode}` | boolean | false |
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| maxTagCount | Max tag count to show | number | - |
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| maxTagPlaceholder | Placeholder for not showing tags | ReactNode/function(omittedValues) | - |
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| mode | Set mode of Select (Support after 2.9) | 'multiple' \| 'tags' \| 'combobox' | - |
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| notFoundContent | Specify content to show when no result matches.. | string | 'Not Found' |
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| optionFilterProp | Which prop value of option will be used for filter if filterOption is true | string | value |
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| optionLabelProp | Which prop value of option will render as content of select. | string | `children` |
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| placeholder | Placeholder of select | string\|ReactNode | - |
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| showSearch | Whether show search input in single mode. | boolean | false |
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| showArrow | Whether to show the drop-down arrow | boolean | true |
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| size | Size of Select input. `default` `large` `small` | string | default |
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| tokenSeparators | Separator used to tokenize on tag/multiple mode | string\[] | |
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| value | Current selected option. | string\|number\|string\[]\|number\[] | - |
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| onBlur | Called when blur | function | - |
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| onChange | Called when select an option or input value change, or value of input is changed in combobox mode | function(value, option:Option/Array<Option\>) | - |
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| onDeselect | Called when a option is deselected, the params are option's value (or key) . only called for multiple or tags, effective in multiple or tags mode only. | function(value, option:Option) | - |
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| onFocus | Called when focus | function | - |
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| onInputKeyDown | Called when key pressed | function | - |
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| onMouseEnter | Called when mouse enter | function | - |
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| onMouseLeave | Called when mouse leave | function | - |
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| onPopupScroll | Called when dropdown scrolls | function | - |
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| onSearch | Callback function that is fired when input changed. | function(value: string) | |
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| onSelect | Called when a option is selected, the params are option's value (or key) and option instance. | function(value, option:Option) | - |
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### Select Methods
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| Name | Description |
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| ---- | ----------- |
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| blur() | Remove focus |
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| focus() | Get focus |
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### Option props
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| Property | Description | Type | Default |
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| -------- | ----------- | ---- | ------- |
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| disabled | Disable this option | boolean | false |
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| key | Same usage as `value`. If React request you to set this property, you can set it to value of option, and then omit value property. | string | |
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| title | `title` of Select after select this Option | string | - |
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| value | default to filter with this property | string\|number | - |
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### OptGroup props
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| Property | Description | Type | Default |
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| -------- | ----------- | ---- | ------- |
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| key | | string | - |
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| label | Group label | string\|React.Element | - |
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