useMagicKeys
响应式按键状态,支持魔法按键组合。
演示
按下以下按键进行测试
V
u
e
U
s
e
Shift
Vue
Use
已按下的按键
用法
ts
import { useMagicKeys } from '@vueuse/core'
const { shift, space, a /* keys you want to monitor */ } = useMagicKeys()
watch(space, (v) => {
if (v)
console.log('space has been pressed')
})
watchEffect(() => {
if (shift.value && a.value)
console.log('Shift + A have been pressed')
})查看所有可能的键码。
组合键
你可以通过使用 `+` 或 `_` 连接按键来神奇地使用组合键(快捷键/热键)。
ts
import { useMagicKeys } from '@vueuse/core'
const keys = useMagicKeys()
const shiftCtrlA = keys['Shift+Ctrl+A']
watch(shiftCtrlA, (v) => {
if (v)
console.log('Shift + Ctrl + A have been pressed')
})ts
import { useMagicKeys } from '@vueuse/core'
const { Ctrl_A_B, space, alt_s /* ... */ } = useMagicKeys()
watch(Ctrl_A_B, (v) => {
if (v)
console.log('Control+A+B have been pressed')
})你也可以使用 `whenever` 函数来使其更短。
ts
import { useMagicKeys, whenever } from '@vueuse/core'
const keys = useMagicKeys()
whenever(keys.shift_space, () => {
console.log('Shift+Space have been pressed')
})当前按下的按键
提供了一个特殊的属性 `current`,用于表示当前按下的所有按键。
ts
import { useMagicKeys, whenever } from '@vueuse/core'
const { current } = useMagicKeys()
console.log(current) // Set { 'control', 'a' }
whenever(
() => current.has('a') && !current.has('b'),
() => console.log('A is pressed but not B'),
)按键别名
ts
import { useMagicKeys, whenever } from '@vueuse/core'
const { shift_cool } = useMagicKeys({
aliasMap: {
cool: 'space',
},
})
whenever(shift_cool, () => console.log('Shift + Space have been pressed'))默认情况下,我们有一些预配置的常用别名。
有条件禁用
你的应用中可能有一些 `` 元素,并且你不希望在用户聚焦这些输入时触发魔法按键处理。这里有一个使用`useActiveElement`和`logicAnd`的示例。
ts
import { useActiveElement, useMagicKeys, whenever } from '@vueuse/core'
import { logicAnd } from '@vueuse/math'
const activeElement = useActiveElement()
const notUsingInput = computed(() =>
activeElement.value?.tagName !== 'INPUT'
&& activeElement.value?.tagName !== 'TEXTAREA',)
const { tab } = useMagicKeys()
whenever(logicAnd(tab, notUsingInput), () => {
console.log('Tab has been pressed outside of inputs!')
})自定义事件处理程序
ts
import { useMagicKeys, whenever } from '@vueuse/core'
const { ctrl_s } = useMagicKeys({
passive: false,
onEventFired(e) {
if (e.ctrlKey && e.key === 's' && e.type === 'keydown')
e.preventDefault()
},
})
whenever(ctrl_s, () => console.log('Ctrl+S have been pressed'))⚠️ 不推荐此用法,请谨慎使用。
响应模式
默认情况下,`useMagicKeys()` 的值是 `Ref
ts
const keys = useMagicKeys({ reactive: true })vue
<template>
<div v-if="keys.shift">
You are holding the Shift key!
</div>
</template>类型声明
显示类型声明
ts
export interface UseMagicKeysOptions<Reactive extends boolean> {
/**
* Returns a reactive object instead of an object of refs
*
* @default false
*/
reactive?: Reactive
/**
* Target for listening events
*
* @default window
*/
target?: MaybeRefOrGetter<EventTarget>
/**
* Alias map for keys, all the keys should be lowercase
* { target: keycode }
*
* @example { ctrl: "control" }
* @default <predefined-map>
*/
aliasMap?: Record<string, string>
/**
* Register passive listener
*
* @default true
*/
passive?: boolean
/**
* Custom event handler for keydown/keyup event.
* Useful when you want to apply custom logic.
*
* When using `e.preventDefault()`, you will need to pass `passive: false` to useMagicKeys().
*/
onEventFired?: (e: KeyboardEvent) => void | boolean
}
export interface MagicKeysInternal {
/**
* A Set of currently pressed keys,
* Stores raw keyCodes.
*
* @see https://mdn.org.cn/en-US/docs/Web/API/KeyboardEvent/key
*/
current: Set<string>
}
export type UseMagicKeysReturn<Reactive extends boolean> = Readonly<
Omit<
Reactive extends true
? Record<string, boolean>
: Record<string, ComputedRef<boolean>>,
keyof MagicKeysInternal
> &
MagicKeysInternal
>
/**
* Reactive keys pressed state, with magical keys combination support.
*
* @see https://vueuse.org.cn/useMagicKeys
*/
export declare function useMagicKeys(
options?: UseMagicKeysOptions<false>,
): UseMagicKeysReturn<false>
export declare function useMagicKeys(
options: UseMagicKeysOptions<true>,
): UseMagicKeysReturn<true>
export { DefaultMagicKeysAliasMap } from "./aliasMap"