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vue3日常项目中定义变量需要引入ref,reactive等等比较麻烦，可以通过unplugin-auto-import给我们自动引入
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unplugin-auto-import
解决了vue3-hook、vue-router、useVue等多个插件的自动导入，也支持自定义插件的自动导入，是一个功能强大的typescript支持工具

一、安装依赖

npm i unplugin-auto-import -D

二、在vite.config.ts文件中添加配置

plugins: [vue(), eslintPlugin(),AutoImport({imports:["vue","vue-router"],dts:'src/auto-import.d.ts',    // 路径下自动生成文件夹存放全局指令})
],

三、在src目录下自动生成auto-import.d.ts文件，用于存放全局指令

/* eslint-disable */
/* prettier-ignore */
// @ts-nocheck
// noinspection JSUnusedGlobalSymbols
// Generated by unplugin-auto-import
export {}
declare global {const EffectScope: typeof import('vue')['EffectScope']const computed: typeof import('vue')['computed']const createApp: typeof import('vue')['createApp']const customRef: typeof import('vue')['customRef']const defineAsyncComponent: typeof import('vue')['defineAsyncComponent']const defineComponent: typeof import('vue')['defineComponent']const effectScope: typeof import('vue')['effectScope']const getCurrentInstance: typeof import('vue')['getCurrentInstance']const getCurrentScope: typeof import('vue')['getCurrentScope']const h: typeof import('vue')['h']const inject: typeof import('vue')['inject']const isProxy: typeof import('vue')['isProxy']const isReactive: typeof import('vue')['isReactive']const isReadonly: typeof import('vue')['isReadonly']const isRef: typeof import('vue')['isRef']const markRaw: typeof import('vue')['markRaw']const nextTick: typeof import('vue')['nextTick']const onActivated: typeof import('vue')['onActivated']const onBeforeMount: typeof import('vue')['onBeforeMount']const onBeforeRouteLeave: typeof import('vue-router')['onBeforeRouteLeave']const onBeforeRouteUpdate: typeof import('vue-router')['onBeforeRouteUpdate']const onBeforeUnmount: typeof import('vue')['onBeforeUnmount']const onBeforeUpdate: typeof import('vue')['onBeforeUpdate']const onDeactivated: typeof import('vue')['onDeactivated']const onErrorCaptured: typeof import('vue')['onErrorCaptured']const onMounted: typeof import('vue')['onMounted']const onRenderTracked: typeof import('vue')['onRenderTracked']const onRenderTriggered: typeof import('vue')['onRenderTriggered']const onScopeDispose: typeof import('vue')['onScopeDispose']const onServerPrefetch: typeof import('vue')['onServerPrefetch']const onUnmounted: typeof import('vue')['onUnmounted']const onUpdated: typeof import('vue')['onUpdated']const provide: typeof import('vue')['provide']const reactive: typeof import('vue')['reactive']const readonly: typeof import('vue')['readonly']const ref: typeof import('vue')['ref']const resolveComponent: typeof import('vue')['resolveComponent']const shallowReactive: typeof import('vue')['shallowReactive']const shallowReadonly: typeof import('vue')['shallowReadonly']const shallowRef: typeof import('vue')['shallowRef']const toRaw: typeof import('vue')['toRaw']const toRef: typeof import('vue')['toRef']const toRefs: typeof import('vue')['toRefs']const toValue: typeof import('vue')['toValue']const triggerRef: typeof import('vue')['triggerRef']const unref: typeof import('vue')['unref']const useAttrs: typeof import('vue')['useAttrs']const useCssModule: typeof import('vue')['useCssModule']const useCssVars: typeof import('vue')['useCssVars']const useLink: typeof import('vue-router')['useLink']const useRoute: typeof import('vue-router')['useRoute']const useRouter: typeof import('vue-router')['useRouter']const useSlots: typeof import('vue')['useSlots']const watch: typeof import('vue')['watch']const watchEffect: typeof import('vue')['watchEffect']const watchPostEffect: typeof import('vue')['watchPostEffect']const watchSyncEffect: typeof import('vue')['watchSyncEffect']
}
// for type re-export
declare global {// @ts-ignoreexport type { Component, ComponentPublicInstance, ComputedRef, ExtractDefaultPropTypes, ExtractPropTypes, ExtractPublicPropTypes, InjectionKey, PropType, Ref, VNode, WritableComputedRef } from 'vue'import('vue')
}

四、运行项目、和eslintrc产生冲突，解决方法如下

在vite.config.ts中补充配置

plugins: [vue(), eslintPlugin(),AutoImport({imports:["vue","vue-router"],dts:'src/auto-import.d.ts',    // 路径下自动生成文件夹存放全局指令eslintrc: {enabled: true,  // 1、改为true用于生成eslint配置。2、生成后改回false，避免重复生成消耗}})
]

这里自动生成.eslintrc-auto-import.json配置文件，最后在.eslintrc.json中加入配置

 "extends": ["./.eslintrc-auto-import.json"]

五、tsconfig.json文件中添加如下配置：

"include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue","src/auto-imports.d.ts"],

这样重新启动项目就可以正常使用了