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编辑当前文件:/home/rejoandoctor/www/node_modules/vue/src/core/vdom/helpers/get-first-component-child.ts
import { isDef, isArray } from 'shared/util' import VNode from '../vnode' import { isAsyncPlaceholder } from './is-async-placeholder' export function getFirstComponentChild( children?: Array<VNode> ): VNode | undefined { if (isArray(children)) { for (let i = 0; i < children.length; i++) { const c = children[i] if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) { return c } } } }