getPropDefaultValue() — vue Function Reference

Architecture documentation for the getPropDefaultValue() function in props.ts from the vue codebase.

Function typescript CoreInstance Lifecycle calls 5 called by 1

Entity Profile

CoreInstance→ Lifecycle→ getPropDefaultValue() — vue Function Reference

Dependency Diagram

graph TD
  f17df5f9_8c05_1fd0_9b66_82a82a8be567["getPropDefaultValue()"]
  d99d7982_2691_1c11_3bae_459f2d25122d["validateProp()"]
  d99d7982_2691_1c11_3bae_459f2d25122d -->|calls| f17df5f9_8c05_1fd0_9b66_82a82a8be567
  f2fe9306_50d5_675e_2dfa_2c4d78443a49["hasOwn()"]
  f17df5f9_8c05_1fd0_9b66_82a82a8be567 -->|calls| f2fe9306_50d5_675e_2dfa_2c4d78443a49
  2d184c1f_e247_ef28_44f9_122886cfd2a5["isObject()"]
  f17df5f9_8c05_1fd0_9b66_82a82a8be567 -->|calls| 2d184c1f_e247_ef28_44f9_122886cfd2a5
  e3484a9f_f8a5_4082_0208_641d58b965c3["warn()"]
  f17df5f9_8c05_1fd0_9b66_82a82a8be567 -->|calls| e3484a9f_f8a5_4082_0208_641d58b965c3
  5af21a52_5316_e857_22eb_dce69bb60268["isFunction()"]
  f17df5f9_8c05_1fd0_9b66_82a82a8be567 -->|calls| 5af21a52_5316_e857_22eb_dce69bb60268
  fbb240de_965a_91cc_941c_3973c9ae84a4["getType()"]
  f17df5f9_8c05_1fd0_9b66_82a82a8be567 -->|calls| fbb240de_965a_91cc_941c_3973c9ae84a4
  style f17df5f9_8c05_1fd0_9b66_82a82a8be567 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/core/util/props.ts lines 64–100

function getPropDefaultValue(
  vm: Component | undefined,
  prop: PropOptions,
  key: string
): any {
  // no default, return undefined
  if (!hasOwn(prop, 'default')) {
    return undefined
  }
  const def = prop.default
  // warn against non-factory defaults for Object & Array
  if (__DEV__ && isObject(def)) {
    warn(
      'Invalid default value for prop "' +
        key +
        '": ' +
        'Props with type Object/Array must use a factory function ' +
        'to return the default value.',
      vm
    )
  }
  // the raw prop value was also undefined from previous render,
  // return previous default value to avoid unnecessary watcher trigger
  if (
    vm &&
    vm.$options.propsData &&
    vm.$options.propsData[key] === undefined &&
    vm._props[key] !== undefined
  ) {
    return vm._props[key]
  }
  // call factory function for non-Function types
  // a value is Function if its prototype is function even across different execution context
  return isFunction(def) && getType(prop.type) !== 'Function'
    ? def.call(vm)
    : def
}