Method export

packages/core/src/document/prop/props.ts:110–132

(stage: TRANSFORM_STAGE = TRANSFORM_STAGE.SAVE)

  }

  export(stage: TRANSFORM_STAGE = TRANSFORM_STAGE.SAVE) {
    if (this.items.length < 1) {
      return {}
    }

    const props: PropsMap = {}
    const extras: PropsMap = {}

    this.items.forEach(item => {
      const key = item.key as string
      if (key == null || item.isUnset()) return
      const value = item.export(stage)
      if (value != null) {
        if (typeof key === 'string' && isExtraKey(key)) {
          extras[getOriginalExtraKey(key)] = value
        } else {
          props[key] = value
        }
      }
    })

    return { props, extras }
  }

  merge(value: PropsMap, extras?: PropsMap) {
    Object.keys(value).forEach(key => {