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142 lines
4.0 KiB
Markdown
142 lines
4.0 KiB
Markdown
---
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description: 'Learn how to display and define keyboard shortcuts in your app.'
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---
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Some components like [Dropdown](/components/dropdown), [Command Palette](/components/command-palette) and [Tooltip](/components/tooltip) support the display of keyboard shortcuts.
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```vue
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<UDropdown :items="[[{ label: 'Edit', shortcuts: ['E'] }]]" />
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```
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Shortcuts are displayed and styled through the [Kbd](/components/kbd) component.
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```vue
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<template>
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<div class="flex items-center gap-0.5">
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<UKbd>⌘</UKbd>
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<UKbd>K</UKbd>
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</div>
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</template>
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```
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::callout{icon="i-heroicons-light-bulb"}
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You will have a preview of how shortcuts are rendered in each component page.
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::
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## `defineShortcuts`
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This module provides a `defineShortcuts` composable that allows you to define keyboard shortcuts in your app really easily.
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```vue
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<template>
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<UModal v-model="isOpen" />
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</template>
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<script setup lang="ts">
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const isOpen = ref(false)
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defineShortcuts({
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meta_k: {
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usingInput: true,
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handler: () => {
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isOpen.value = !isOpen.value
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}
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}
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})
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</script>
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```
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Shortcuts keys are written as the literal keyboard key value. Combinations are made with `_` separator. Chained shortcuts are made with `-` separator.
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Modifiers are also available:
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- `meta`: acts as `Command` for MacOS and `Control` for others
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- `ctrl`: acts as `Control`
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- `shift`: acts as `Shift` and is only necessary for alphabetic keys
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Examples of keys:
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- `escape`: will trigger by hitting `Esc`
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- `meta_k`: will trigger by hitting `⌘` and `K` at the same time on MacOS, and `Ctrl` and `K` on Windows and Linux
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- `ctrl_k`: will trigger by hitting `Ctrl` and `K` at the same time on MacOS, Windows and Linux
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- `shift_e`: will trigger by hitting `Shift` and `E` at the same time on MacOS, Windows and Linux
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- `?`: will trigger by hitting `?` on some keyboard layouts, or for example `Shift` and `/`, which results in `?` on US Mac keyboards
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- `g-d`: will trigger by hitting `g` then `d` with a maximum delay of 800ms by default
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- `arrowleft`: will trigger by hitting `←` (also: `arrowright`, `arrowup`, `arrowdown`)
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::callout{icon="i-heroicons-light-bulb"}
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For a complete list of available shortcut keys, refer to the [`KeyboardEvent`](https://developer.mozilla.org/en-US/docs/Web/API/UI_Events/Keyboard_event_key_values) API docs. Note the `KeyboardEvent.key` has to be written in lowercase.
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::
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### `usingInput`
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Prop: `usingInput?: string | boolean`
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By default, `usingInput` is `false`, meaning it will only trigger when no input is focused. When set to `true`, the shortcut will also trigger when any input is focused.
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For a more advanced behavior, `usingInput` can be set to the name of an input, so it only triggers when focusing this specific input.
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```vue
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<template>
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<UInput v-model="query" name="queryInput" />
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</template>
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<script setup lang="ts">
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const query = ref('')
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defineShortcuts({
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enter: {
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usingInput: 'queryInput',
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handler: () => {
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// TODO
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}
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}
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})
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</script>
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```
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_`enter` shortcut will only trigger when `queryInput` is focused._
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### `whenever`
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Prop: `whenever?: WatchSource<boolean>[]`
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`whenever` allows to add constraints on the shortcut triggering behavior. This array can contain `Ref<boolean>`, `ComputedRef<boolean>` or `() => boolean`.
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```ts
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defineShortcuts({
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meta_k: {
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usingInput: true,
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handler: () => { isOpen.value = !isOpen.value }
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},
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escape: {
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usingInput: true,
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whenever: [isOpen],
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handler: () => { isOpen.value = false }
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}
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})
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```
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_`escape` shortcut will only trigger when `isOpen` is `true`._
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### Simple shortcut
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In case the shortcut does not need any config, it can be written as a function.
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```ts
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defineShortcuts({
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'?': () => openHelpModal()
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})
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```
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## `useShortcuts`
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To display shortcuts in your app according to the user's OS, you can use the `useShortcuts` composable.
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```vue
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<script setup>
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const { metaSymbol } = useShortcuts()
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</script>
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<template>
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<UKbd>{{ metaSymbol }}</UKbd>
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</template>
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```
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_`metaSymbol` will display either `⌘` on MacOS or `Ctrl` on any other OS_
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