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useKeyModifier

反应式 修饰符状态。跟踪任何 支持的修饰符 的状态 - 请参阅浏览器兼容性说明。

¥Reactive Modifier State. Tracks state of any of the supported modifiers - see Browser Compatibility notes.

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示例

capsLock
numLock
scrollLock
shift
control
alt

用法

¥Usage

ts
import { useKeyModifier } from '@vueuse/core'

const capsLockState = useKeyModifier('CapsLock')

console.log(capsLockState.value)

活动

¥Events

你可以自定义哪些事件将提示状态更新。默认情况下,这些是 mouseupmousedownkeyupkeydown。要自定义这些事件:

¥You can customize which events will prompt the state to update. By default, these are mouseup, mousedown, keyup, keydown. To customize these events:

ts
import { useKeyModifier } from '@vueuse/core'

const capsLockState = useKeyModifier('CapsLock', { events: ['mouseup', 'mousedown'] })

console.log(capsLockState) // null

// Caps Lock turned on with key press
console.log(capsLockState) // null

// Mouse button clicked
console.log(capsLockState) // true

初始状态

¥Initial State

默认情况下,返回的 ref 将为 Ref<null>,直到收到第一个事件。你可以通过以下方式显式地将初始状态传递给它:

¥By default, the returned ref will be Ref<null> until the first event is received. You can explicitly pass the initial state to it via:

ts
const capsLockState1 = useKeyModifier('CapsLock') // Ref<boolean | null>
const capsLockState2 = useKeyModifier('CapsLock', { initial: false }) // Ref<boolean>