useSubject
将 RxJS Subject 绑定到一个 ref 上，并在两者之间传播值变化。
示例
Available in the @vueuse/rxjs add-on.用法
ts
import { useSubject } from '@vueuse/rxjs'
import { Subject } from 'rxjs'
const subject = new Subject()
// setup()
const subjectRef = useSubject(subject)
// Changes to subjectRef.value will be pushed to the subject
subjectRef.value = 'new value'
// Values emitted by the subject will update subjectRef
subject.next('from subject')使用 BehaviorSubject
当使用 BehaviorSubject 时，返回的 ref 会用 subject 当前的值进行初始化，且类型不会包含 undefined：
ts
import { useSubject } from '@vueuse/rxjs'
import { BehaviorSubject } from 'rxjs'
const subject = new BehaviorSubject('initial')
// setup()
const subjectRef = useSubject(subject) // Ref<string>，而不是 Ref<string | undefined>
console.log(subjectRef.value) // 'initial'错误处理
如果你想要为可能出错的 Subject 添加自定义错误处理，你可以提供一个可选的 onError 配置。如果没有提供，RxJS 将把提供的 observable 中的任何错误视为“未处理的错误”，并且它将在新的调用栈中抛出，并报告给 window.onerror（如果你在 Node 环境中则报告给 process.on('error')）。
ts
import { useSubject } from '@vueuse/rxjs'
import { Subject } from 'rxjs'
const subject = new Subject()
// setup()
const subjectRef = useSubject(subject, {
onError: (err) => {
console.log(err.message) // "oops"
},
})类型声明
ts
export interface UseSubjectOptions<I = undefined> extends Omit<
UseObservableOptions<I>,
"initialValue"
> {}
export declare function useSubject<H>(
subject: BehaviorSubject<H>,
options?: UseSubjectOptions,
): Ref<H>
export declare function useSubject<H>(
subject: Subject<H>,
options?: UseSubjectOptions,
): Ref<H | undefined>源码
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