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95 lines
5.3 KiB
Markdown
95 lines
5.3 KiB
Markdown
---
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category: Components
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title: AutoComplete
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cover: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*g8THS4NpV6sAAAAAAAAAAAAADrJ8AQ/original
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coverDark: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*WERTQ6qvgEYAAAAAAAAAAAAADrJ8AQ/original
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group:
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title: Data Entry
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order: 4
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demo:
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cols: 2
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---
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Autocomplete function of input field.
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## When To Use
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- When you need an input box instead of a selector.
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- When you need input suggestions or helping text.
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The differences with Select are:
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- AutoComplete is an input box with text hints, and users can type freely. The keyword is aiding **input**.
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- Select is selecting among given choices. The keyword is **select**.
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## Examples
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<!-- prettier-ignore -->
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<code src="./demo/basic.tsx">Basic Usage</code>
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<code src="./demo/options.tsx">Customized</code>
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<code src="./demo/custom.tsx">Customize Input Component</code>
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<code src="./demo/non-case-sensitive.tsx">Non-case-sensitive AutoComplete</code>
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<code src="./demo/certain-category.tsx">Lookup-Patterns - Certain Category</code>
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<code src="./demo/uncertain-category.tsx">Lookup-Patterns - Uncertain Category</code>
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<code src="./demo/status.tsx">Status</code>
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<code src="./demo/borderless.tsx">Borderless</code>
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<code src="./demo/allowClear.tsx">Customize clear button</code>
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<code src="./demo/form-debug.tsx" debug>Debug in Form</code>
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<code src="./demo/render-panel.tsx" debug>_InternalPanelDoNotUseOrYouWillBeFired</code>
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## API
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Common props ref：[Common props](/docs/react/common-props)
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| Property | Description | Type | Default | Version |
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| --- | --- | --- | --- | --- |
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| allowClear | Show clear button | boolean \| { clearIcon?: ReactNode } | false | 5.8.0: Support Object type |
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| autoFocus | If get focus when component mounted | boolean | false | |
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| backfill | If backfill selected item the input when using keyboard | boolean | false | |
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| bordered | Whether has border style | boolean | true | |
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| children (for customize input element) | Customize input element | HTMLInputElement \| HTMLTextAreaElement \| React.ReactElement<InputProps> | <Input /> | |
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| children (for dataSource) | Data source to auto complete | React.ReactElement<OptionProps> \| Array<React.ReactElement<OptionProps>> | - | |
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| defaultActiveFirstOption | Whether active first option by default | boolean | true | |
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| defaultOpen | Initial open state of dropdown | boolean | - | |
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| defaultValue | Initial selected option | string | - | |
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| disabled | Whether disabled select | boolean | false | |
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| popupClassName | The className of dropdown menu | string | - | 4.23.0 |
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| dropdownMatchSelectWidth | Determine whether the dropdown menu and the select input are the same width. Default set `min-width` same as input. Will ignore when value less than select width. `false` will disable virtual scroll | boolean \| number | true | |
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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 \| function(inputValue, option) | true | |
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| notFoundContent | Specify content to show when no result matches | string | `Not Found` | |
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| open | Controlled open state of dropdown | boolean | - | |
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| options | Select options. Will get better perf than jsx definition | { label, value }\[] | - | |
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| placeholder | The placeholder of input | string | - | |
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| status | Set validation status | 'error' \| 'warning' | - | 4.19.0 |
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| value | Selected option | string | - | |
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| onBlur | Called when leaving the component | function() | - | |
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| onChange | Called when selecting an option or changing an input value | function(value) | - | |
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| onDropdownVisibleChange | Call when dropdown open | function(open) | - | |
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| onFocus | Called when entering the component | function() | - | |
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| onSearch | Called when searching items | function(value) | - | |
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| onSelect | Called when a option is selected. param is option's value and option instance | function(value, option) | - | |
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| onClear | Called when clear | function | - | 4.6.0 |
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## Methods
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| Name | Description | Version |
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| ------- | ------------ | ------- |
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| blur() | Remove focus | |
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| focus() | Get focus | |
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## Design Token
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<ComponentTokenTable component="Select"></ComponentTokenTable>
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## FAQ
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### Why doesn't the text composition system work well with onSearch in controlled mode?
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Please use `onChange` to manage control state. `onSearch` is used for searching input which is not the same as `onChange`. Besides, clicking on the option will not trigger the `onSearch` event.
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Related issue: [#18230](https://github.com/ant-design/ant-design/issues/18230) [#17916](https://github.com/ant-design/ant-design/issues/17916)
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### Why won't a controlled open AutoComplete display a drop-down menu when options are empty?
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The AutoComplete component is essentially an extension of the Input form element. When the `options` property is empty, displaying empty text could mislead the user into believing the component is not operational, when in fact they are still able to input text. To avoid confusion, the `open` property will not display the drop-down menu when set to `true` and in combination with an empty `options` property. The `open` property must be used in conjunction with the `options` property.
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