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261 lines
23 KiB
Markdown
261 lines
23 KiB
Markdown
---
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title: Input
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lang: en-US
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---
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# Input
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Input data using mouse or keyboard.
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:::warning
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Input is a controlled component, it **always shows Vue binding value**.
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Under normal circumstances, `input` event should be handled. Its handler should update component's binding value (or use `v-model`). Otherwise, input box's value will not change.
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Do not support `v-model` modifiers.
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:::
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## Basic usage
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:::demo
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input/basic
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:::
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## Disabled
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:::demo Disable the Input with the `disabled` attribute.
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input/disabled
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:::
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## Clearable
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:::demo Make the Input clearable with the `clearable` attribute.
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input/clearable
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:::
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## Formatter
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Display value within it's situation with `formatter`, and we usually use `parser` at the same time.
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:::demo
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input/formatter
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:::
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## Password box
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:::demo Make a toggle-able password Input with the `show-password` attribute.
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input/password
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:::
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## Input with icon
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Add an icon to indicate input type.
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:::demo To add icons in Input, you can simply use `prefix-icon` and `suffix-icon` attributes. Also, the `prefix` and `suffix` named slots works as well.
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input/with-icon
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:::
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## Textarea
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Resizable for entering multiple lines of text information. Add attribute `type="textarea"` to change `input` into native `textarea`.
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:::demo Control the height by setting the `rows` prop.
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input/textarea
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:::
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## Autosize Textarea
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Setting the `autosize` prop for a textarea type of Input makes the height to automatically adjust based on the content. An options object can be provided to `autosize` to specify the minimum and maximum number of lines the textarea can automatically adjust.
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:::demo
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input/auto-sizing-textarea
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:::
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## Mixed input
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Prepend or append an element, generally a label or a button.
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:::demo Use `slot` to distribute elements that prepend or append to Input.
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input/mixed-input
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:::
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## Sizes
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:::demo Add `size` attribute to change the size of Input. In addition to the default size, there are two other options: `large`, `small`.
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input/various-size
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:::
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## Autocomplete
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You can get some recommended tips based on the current input.
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:::demo Autocomplete component provides input suggestions. The `fetch-suggestions` attribute is a method that returns suggested input. In this example, `querySearch(queryString, cb)` returns suggestions to Autocomplete via `cb(data)` when suggestions are ready.
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input/autocomplete
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:::
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## Custom template
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Customize how suggestions are displayed.
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:::demo Use `scoped slot` to customize suggestion items. In the scope, you can access the suggestion object via the `item` key.
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input/autocomplete-template
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:::
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## Remote search
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Search data from server-side.
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:::demo
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input/remote-search
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:::
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## Limit length
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:::demo `maxlength` and `minlength` attributes of input, they declare a limit on the number of characters a user can input. The "number of characters" is measured using JavaScript string length.Setting the `maxlength` prop for a text or textarea type of Input can limit the length of input value, allows you to show word count by setting `show-word-limit` to `true` at the same time.
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input/length-limiting
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:::
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## Input Attributes
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| Attribute | Description | Type | Accepted Values | Default |
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| -------------------- | -------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- | ------- |
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| type | type of input | string | text, textarea and other [native input types](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#Form_%3Cinput%3E_types) | text |
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| modelValue / v-model | binding value | string / number | — | — |
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| maxlength | the max length | string / number | — | — |
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| minlength | same as `minlength` in native input | number | — | — |
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| show-word-limit | whether show word count，only works when `type` is 'text' or 'textarea' | boolean | — | false |
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| placeholder | placeholder of Input | string | — | — |
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| clearable | whether to show clear button | boolean | — | false |
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| formatter | specifies the format of the value presented input.(only works when `type` is 'text') | function(value: string / number): string | — | — |
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| parser | specifies the value extracted from formatter input.(only works when `type` is 'text') | function(string): string | — | — |
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| show-password | whether to show toggleable password input | boolean | — | false |
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| disabled | whether Input is disabled | boolean | — | false |
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| size | size of Input, works when `type` is not 'textarea' | string | large / default / small | — |
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| prefix-icon | prefix icon component | string / Component | — | — |
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| suffix-icon | suffix icon component | string / Component | — | — |
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| rows | number of rows of textarea, only works when `type` is 'textarea' | number | — | 2 |
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| autosize | whether textarea has an adaptive height, only works when `type` is 'textarea'. Can accept an object, e.g. `{ minRows: 2, maxRows: 6 }` | boolean / object | — | false |
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| autocomplete | same as `autocomplete` in native input | string | — | off |
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| name | same as `name` in native input | string | — | — |
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| readonly | same as `readonly` in native input | boolean | — | false |
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| max | same as `max` in native input | — | — | — |
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| min | same as `min` in native input | — | — | — |
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| step | same as `step` in native input | — | — | — |
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| resize | control the resizability | string | none / both / horizontal / vertical | — |
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| autofocus | same as `autofocus` in native input | boolean | — | false |
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| form | same as `form` in native input | string | — | — |
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| label | label text | string | — | — |
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| tabindex | input tabindex | string / number | - | - |
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| validate-event | whether to trigger form validation | boolean | - | true |
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| input-style | the style of the input element or textarea element | object | - | {} |
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## Input slots
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| Name | Description |
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| ------- | ----------------------------------------------------------------- |
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| prefix | content as Input prefix, only works when `type` is 'text' |
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| suffix | content as Input suffix, only works when `type` is 'text' |
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| prepend | content to prepend before Input, only works when `type` is 'text' |
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| append | content to append after Input, only works when `type` is 'text' |
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## Input Events
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| Event Name | Description | Parameters |
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| ---------- | ---------------------------------------------------------------------- | ------------------------- |
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| blur | triggers when Input blurs | (event: Event) |
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| focus | triggers when Input focuses | (event: Event) |
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| change | triggers only when the input box loses focus or the user presses Enter | (value: string \| number) |
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| input | triggers when the Input value change | (value: string \| number) |
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| clear | triggers when the Input is cleared by clicking the clear button | — |
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## Input Methods
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| Method | Description | Parameters |
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| ------ | -------------------------------- | ---------- |
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| focus | focus the input element | — |
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| blur | blur the input element | — |
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| select | select the text in input element | — |
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## Autocomplete Attributes
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| Attribute | Description | Type | Accepted Values | Default |
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| --------------------------------- | -------------------------------------------------------------------------------------------------------------------------- | ------------------------------- | -------------------------------------------------------------- | ------------ |
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| placeholder | the placeholder of Autocomplete | string | — | — |
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| clearable | whether to show clear button | boolean | — | false |
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| disabled | whether Autocomplete is disabled | boolean | — | false |
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| value-key | key name of the input suggestion object for display | string | — | value |
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| icon | icon component | string / Component | — | — |
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| model-value / v-model | binding value | string | — | — |
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| debounce | debounce delay when typing, in milliseconds | number | — | 300 |
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| placement | placement of the popup menu | string | top / top-start / top-end / bottom / bottom-start / bottom-end | bottom-start |
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| fetch-suggestions | a method to fetch input suggestions. When suggestions are ready, invoke `callback(data:[])` to return them to Autocomplete | Function(queryString, callback) | — | — |
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| popper-class | custom class name for autocomplete's dropdown | string | — | — |
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| trigger-on-focus | whether show suggestions when input focus | boolean | — | true |
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| name | same as `name` in native input | string | — | — |
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| select-when-unmatched | whether to emit a `select` event on enter when there is no autocomplete match | boolean | — | false |
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| label | label text | string | — | — |
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| prefix-icon | prefix icon class | string / Component | — | — |
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| suffix-icon | suffix icon class | string / Component | — | — |
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| hide-loading | whether to hide the loading icon in remote search | boolean | — | false |
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| popper-append-to-body(deprecated) | whether to append the dropdown to body. If the positioning of the dropdown is wrong, you can try to set this prop to false | boolean | - | false |
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| teleported | whether select dropdown is teleported to the body | boolean | true / false | true |
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| highlight-first-item | whether to highlight first item in remote search suggestions by default | boolean | — | false |
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## Autocomplete Slots
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| Name | Description |
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| ------- | ------------------------------- |
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| prefix | content as Input prefix |
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| suffix | content as Input suffix |
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| prepend | content to prepend before Input |
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| append | content to append after Input |
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## Autocomplete Scoped Slot
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| Name | Description |
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| ---- | --------------------------------------------------------------------- |
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| — | Custom content for input suggestions. The scope parameter is { item } |
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## Autocomplete Events
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| Event Name | Description | Parameters |
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| ---------- | ------------------------------------------------ | ------------------------- |
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| select | triggers when a suggestion is clicked | suggestion being clicked |
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| change | triggers when the icon inside Input value change | (value: string \| number) |
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## Autocomplete Methods
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| Method | Description | Parameters |
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| ------ | ----------------------- | ---------- |
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| focus | focus the input element | — |
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