del() — vue Function Reference

Architecture documentation for the del() function in index.ts from the vue codebase.

Function typescript CoreRuntime ObserverSystem calls 1

Entity Profile

CoreRuntime→ ObserverSystem→ del() — vue Function Reference

Dependency Diagram

graph TD
  65d6c0bc_8e31_6ec0_0f11_1e01142bff2d["del()"]
  a736e9c3_51fa_4ff8_f139_f83b45794e0f["notify()"]
  65d6c0bc_8e31_6ec0_0f11_1e01142bff2d -->|calls| a736e9c3_51fa_4ff8_f139_f83b45794e0f
  style 65d6c0bc_8e31_6ec0_0f11_1e01142bff2d fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/core/observer/index.ts lines 283–323

export function del(target: any[] | object, key: any) {
  if (__DEV__ && (isUndef(target) || isPrimitive(target))) {
    warn(
      `Cannot delete reactive property on undefined, null, or primitive value: ${target}`
    )
  }
  if (isArray(target) && isValidArrayIndex(key)) {
    target.splice(key, 1)
    return
  }
  const ob = (target as any).__ob__
  if ((target as any)._isVue || (ob && ob.vmCount)) {
    __DEV__ &&
      warn(
        'Avoid deleting properties on a Vue instance or its root $data ' +
          '- just set it to null.'
      )
    return
  }
  if (isReadonly(target)) {
    __DEV__ &&
      warn(`Delete operation on key "${key}" failed: target is readonly.`)
    return
  }
  if (!hasOwn(target, key)) {
    return
  }
  delete target[key]
  if (!ob) {
    return
  }
  if (__DEV__) {
    ob.dep.notify({
      type: TriggerOpTypes.DELETE,
      target: target,
      key
    })
  } else {
    ob.dep.notify()
  }
}