⬅️ Back to Table of Contents

📄 from

📊 Analysis Summary

Metric	Count
🔧 Functions	2
📦 Imports	10
🟢 Vue Composition API	2

📚 Table of Contents

• Imports
• Vue Composition API
• Functions

🛠️ File Location:

📂 packages/rxjs/from/index.ts

📦 Imports

Name	Source
ObservableInput	rxjs
Subscription	rxjs
MaybeRef	vue
Ref	vue
WatchOptions	vue
fromEventRx	rxjs
fromRxjs	rxjs
Observable	rxjs
isRef	vue
watch	vue

---

Vue Composition API

Name	Type	Reactive Variables	Composables
watch	watch	none	none
watch	watch	none	none

---

Functions

from(value: ObservableInput<T> | Ref<T>, watchOptions: WatchOptions): Observable<T>

Parameters:

• value ObservableInput<T> | Ref<T>
• watchOptions WatchOptions

Returns: Observable<T>

Calls:

• isRef (from vue)
• watch (from vue)
• subscriber.next
• fromRxjs (from rxjs)

Code

export function from<T>(value: ObservableInput<T> | Ref<T>, watchOptions?: WatchOptions): Observable<T> {
  if (isRef<T>(value))
    return new Observable(subscriber => watch(value, val => subscriber.next(val), watchOptions))

  return fromRxjs(value)
}

fromEvent(value: MaybeRef<T>, event: string): Observable<Event>

Parameters:

• value MaybeRef<T>
• event string

Returns: Observable<Event>

Calls:

• isRef (from vue)
• watch (from vue)
• innerSub?.unsubscribe
• fromEventRx(element, event).subscribe
• subscriber.add
• fromEventRx (from rxjs)

Code

export function fromEvent<T extends HTMLElement | null>(value: MaybeRef<T>, event: string): Observable<Event> {
  if (isRef<T>(value)) {
    return new Observable((subscriber) => {
      let innerSub: Subscription | undefined
      return watch(value, (element) => {
        innerSub?.unsubscribe()
        if (element instanceof HTMLElement) {
          innerSub = fromEventRx(element, event).subscribe(subscriber)
          subscriber.add(innerSub)
        }
      }, { immediate: true })
    })
  }
  if (value === null) {
    throw new Error('The value is `null`, and it should be an HTMLElement.')
  }
  return fromEventRx(value, event)
}

---

Generated by Syntax Scribe