shoelace/docs/pages/components/select.md

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2023-06-06 12:22:18 +00:00
---
meta:
title: Select
description: Selects allow you to choose items from a menu of predefined options.
layout: component
---
```html:preview
<sl-select>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
<sl-option value="option-4">Option 4</sl-option>
<sl-option value="option-5">Option 5</sl-option>
<sl-option value="option-6">Option 6</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
<SlOption value="option-4">Option 4</SlOption>
<SlOption value="option-5">Option 5</SlOption>
<SlOption value="option-6">Option 6</SlOption>
</SlSelect>
);
```
:::tip
This component works with standard `<form>` elements. Please refer to the section on [form controls](/getting-started/form-controls) to learn more about form submission and client-side validation.
:::
## Examples
### Labels
Use the `label` attribute to give the select an accessible label. For labels that contain HTML, use the `label` slot instead.
```html:preview
<sl-select label="Select one">
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect label="Select one">
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
);
```
### Help Text
Add descriptive help text to a select with the `help-text` attribute. For help texts that contain HTML, use the `help-text` slot instead.
```html:preview
<sl-select label="Experience" help-text="Please tell us your skill level.">
<sl-option value="1">Novice</sl-option>
<sl-option value="2">Intermediate</sl-option>
<sl-option value="3">Advanced</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect label="Experience" help-text="Please tell us your skill level.">
<SlOption value="1">Novice</SlOption>
<SlOption value="2">Intermediate</SlOption>
<SlOption value="3">Advanced</SlOption>
</SlSelect>
);
```
### Placeholders
Use the `placeholder` attribute to add a placeholder.
```html:preview
<sl-select placeholder="Select one">
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect placeholder="Select one">
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
);
```
### Clearable
Use the `clearable` attribute to make the control clearable. The clear button only appears when an option is selected.
```html:preview
<sl-select clearable value="option-1">
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect placeholder="Clearable" clearable>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
);
```
### Filled Selects
Add the `filled` attribute to draw a filled select.
```html:preview
<sl-select filled>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect filled>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
);
```
### Pill
Use the `pill` attribute to give selects rounded edges.
```html:preview
<sl-select pill>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect pill>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
);
```
### Disabled
Use the `disabled` attribute to disable a select.
```html:preview
<sl-select placeholder="Disabled" disabled>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect placeholder="Disabled" disabled>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
);
```
### Multiple
To allow multiple options to be selected, use the `multiple` attribute. It's a good practice to use `clearable` when this option is enabled. To set multiple values at once, set `value` to a space-delimited list of values.
```html:preview
<sl-select label="Select a Few" value="option-1 option-2 option-3" multiple clearable>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
<sl-option value="option-4">Option 4</sl-option>
<sl-option value="option-5">Option 5</sl-option>
<sl-option value="option-6">Option 6</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect label="Select a Few" value={["option-1", "option-2", "option-3"]} multiple clearable>
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<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
<SlOption value="option-4">Option 4</SlOption>
<SlOption value="option-5">Option 5</SlOption>
<SlOption value="option-6">Option 6</SlOption>
</SlSelect>
);
```
:::tip
Note that multi-select options may wrap, causing the control to expand vertically. You can use the `max-options-visible` attribute to control the maximum number of selected options to show at once.
:::
### Setting Initial Values
Use the `value` attribute to set the initial selection.
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When using `multiple`, the `value` _attribute_ uses space-delimited values to select more than one option. Because of this, `<sl-option>` values cannot contain spaces. If you're accessing the `value` _property_ through Javascript, it will be an array.
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```html:preview
<sl-select value="option-1 option-2" multiple clearable>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
<sl-option value="option-4">Option 4</sl-option>
</sl-select>
```
```jsx:react
import SlDivider from '@shoelace-style/shoelace/dist/react/divider';
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect value={["option-1", "option-2"]} multiple clearable>
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<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
);
```
### Grouping Options
Use `<sl-divider>` to group listbox items visually. You can also use `<small>` to provide labels, but they won't be announced by most assistive devices.
```html:preview
<sl-select>
<small>Section 1</small>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
<sl-divider></sl-divider>
<small>Section 2</small>
<sl-option value="option-4">Option 4</sl-option>
<sl-option value="option-5">Option 5</sl-option>
<sl-option value="option-6">Option 6</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
<SlOption value="option-4">Option 4</SlOption>
<SlOption value="option-5">Option 5</SlOption>
<SlOption value="option-6">Option 6</SlOption>
</SlSelect>
);
```
### Sizes
Use the `size` attribute to change a select's size. Note that size does not apply to listbox options.
```html:preview
<sl-select placeholder="Small" size="small">
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
<br />
<sl-select placeholder="Medium" size="medium">
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
<br />
<sl-select placeholder="Large" size="large">
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<>
<SlSelect placeholder="Small" size="small">
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
<br />
<SlSelect placeholder="Medium" size="medium">
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
<br />
<SlSelect placeholder="Large" size="large">
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
</>
);
```
### Placement
The preferred placement of the select's listbox can be set with the `placement` attribute. Note that the actual position may vary to ensure the panel remains in the viewport. Valid placements are `top` and `bottom`.
```html:preview
<sl-select placement="top">
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
Submenus (#1527) * [RFC] Proof-of-concept commit for submenu support This is a Request For Comments to seek directional guidance towards implementing the submenu slot of menu-item. Includes: - SubmenuController to manage event listeners on menu-item. - Example usage in menu-item documentation. - Trivial tests to check rendering. Outstanding questions include: - Accessibility concerns. E.g. where to handle 'ArrowRight', 'ArrowLeft'? - Should selection of menu-item denoting submenu be possible or customizable? - How to parameterize contained popup? - Implementation concerns: - Use of ref / id - delegation of some rendering to the controller - What to test Related to [#620](https://github.com/shoelace-style/shoelace/issues/620). * Update submenu-controller.ts Removed extraneous `console.log()`. * PoC working of ArrowRight to focus on submenu. * Revert "PoC working of ArrowRight to focus on submenu." (Didn't mean to publish this.) This reverts commit be04e9a221e7b9e38995297e70d4517b3fae6468. * [WIP] Submenu WIP continues. - Submenus now close on change-of-focus, not a timeout. - Keyboard navigation support added. - Skidding fix for better alignment. - Submenu documentation moved to Menu page. - Tests for accessibility, right and left arrow keys. * Cleanup: Removed dead code and dead code comments. * style: Eslint warnings and errors fixed. npm run verify now passes. * fix: 2 changes to menu / submenu on-click behavior: 1. Close submenu on click explicitly, so this occurs even if the menu is not inside of an sl-dropdown. 2. In menu, ignore clicks that do not explicitly target a menu-item. Clicks that were on (e.g. a menu-border) were emitting select events. * fix: Prevent menu's extraneous Enter / space key propagation. Menu's handleKeyDown calls item.click (to emit the selection). Propagating the keyboard event on Enter / space would the cause re-entry into a submenu, so prevent the needless propagation. * Submenu tweaks ... - 100 ms delay when opening submenus on mouseover - Shadows added - Distance added to popup to have submenus overlap menu slightly. * polish up submenu stuff * stay highlighted when submenu is open * update changelog * resolve feedback --------- Co-authored-by: Bryce Moore <bryce.moore@gmail.com>
2023-08-21 21:26:41 +00:00
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<SlSelect placement="top">
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlDropdown>
);
```
### Prefix Icons
Use the `prefix` slot to prepend an icon to the control.
```html:preview
<sl-select placeholder="Small" size="small" clearable>
<sl-icon name="house" slot="prefix"></sl-icon>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
<br />
<sl-select placeholder="Medium" size="medium" clearable>
<sl-icon name="house" slot="prefix"></sl-icon>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
<br />
<sl-select placeholder="Large" size="large" clearable>
<sl-icon name="house" slot="prefix"></sl-icon>
<sl-option value="option-1">Option 1</sl-option>
<sl-option value="option-2">Option 2</sl-option>
<sl-option value="option-3">Option 3</sl-option>
</sl-select>
```
```jsx:react
import SlIcon from '@shoelace-style/shoelace/dist/react/icon';
import SlOption from '@shoelace-style/shoelace/dist/react/option';
import SlSelect from '@shoelace-style/shoelace/dist/react/select';
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const App = () => (
<>
<SlSelect placeholder="Small" size="small">
<SlIcon name="house" slot="prefix"></SlIcon>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
<br />
<SlSelect placeholder="Medium" size="medium">
<SlIcon name="house" slot="prefix"></SlIcon>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
<br />
<SlSelect placeholder="Large" size="large">
<SlIcon name="house" slot="prefix"></SlIcon>
<SlOption value="option-1">Option 1</SlOption>
<SlOption value="option-2">Option 2</SlOption>
<SlOption value="option-3">Option 3</SlOption>
</SlSelect>
</>
);
```
### Custom Tags
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When multiple options can be selected, you can provide custom tags by passing a function to the `getTag` property. Your function can return a string of HTML, a <a href="https://lit.dev/docs/templates/overview/">Lit Template</a>, or an [`HTMLElement`](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement). The `getTag()` function will be called for each option. The first argument is an `<sl-option>` element and the second argument is the tag's index (its position in the tag list).
Remember that custom tags are rendered in a shadow root. To style them, you can use the `style` attribute in your template or you can add your own [parts](/getting-started/customizing/#css-parts) and target them with the [`::part()`](https://developer.mozilla.org/en-US/docs/Web/CSS/::part) selector.
```html:preview
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<sl-select
placeholder="Select one"
value="email phone"
multiple
clearable
class="custom-tag"
>
<sl-option value="email">
<sl-icon slot="prefix" name="envelope"></sl-icon>
Email
</sl-option>
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<sl-option value="phone">
<sl-icon slot="prefix" name="telephone"></sl-icon>
Phone
</sl-option>
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<sl-option value="chat">
<sl-icon slot="prefix" name="chat-dots"></sl-icon>
Chat
</sl-option>
</sl-select>
<script type="module">
const select = document.querySelector('.custom-tag');
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select.getTag = (option, index) => {
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// Use the same icon used in the <sl-option>
const name = option.querySelector('sl-icon[slot="prefix"]').name;
// You can return a string, a Lit Template, or an HTMLElement here
return `
<sl-tag removable>
<sl-icon name="${name}" style="padding-inline-end: .5rem;"></sl-icon>
${option.getTextLabel()}
</sl-tag>
`;
};
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</script>
```
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:::warning
Be sure you trust the content you are outputting! Passing unsanitized user input to `getTag()` can result in XSS vulnerabilities.
:::