computedEager
预计算而无需惰性求值。
¥Eager computed without lazy evaluation.
提示
注意💡：如果你使用的是 Vue 3.4+，则可以立即使用 computed。在 Vue 3.4+ 中，如果计算的新值没有变化，则不会触发 computed、effect、watch、watchEffect、render 依赖。参见：https://github.com/vuejs/core/pull/5912
¥Note💡: If you are using Vue 3.4+, you can use computed right away. In Vue 3.4+, if the computed new value does not change, computed, effect, watch, watchEffect, render dependencies will not be triggered. See: https://github.com/vuejs/core/pull/5912
欲了解更多信息，请访问 Vue：当计算属性可能是错误的工具时。
¥Learn more at Vue: When a computed property can be the wrong tool.
当你进行复杂的计算时，请使用
computed()，这实际上可以从缓存和惰性求值中受益，并且只有在确实必要时才应该（重新）计算。¥Use
computed()when you have a complex calculation going on, which can actually profit from caching and lazy evaluation and should only be (re-)calculated if really necessary.当你进行简单操作且返回值很少变化（通常是布尔值）时，请使用
computedEager()。¥Use
computedEager()when you have a simple operation, with a rarely changing return value – often a boolean.
示例
用法
¥Usage
import { computedEager } from '@vueuse/core'
const todos = ref([])
const hasOpenTodos = computedEager(() => !!todos.length)
console.log(hasOpenTodos.value) // false
toTodos.value.push({ title: 'Learn Vue' })
console.log(hasOpenTodos.value) // true类型声明
export type ComputedEagerOptions = WatchOptionsBase
export type ComputedEagerReturn<T = any> = Readonly<ShallowRef<T>>
/**
* Note: If you are using Vue 3.4+, you can straight use computed instead.
* Because in Vue 3.4+, if computed new value does not change,
* computed, effect, watch, watchEffect, render dependencies will not be triggered.
* refer: https://github.com/vuejs/core/pull/5912
*
* @param fn effect function
* @param options WatchOptionsBase
* @returns readonly shallowRef
*/
export declare function computedEager<T>(
fn: () => T,
options?: ComputedEagerOptions,
): ComputedEagerReturn<T>
export { computedEager as eagerComputed }