declare global

如果，要在全局作用域中声明一个新的变量或函数，供整个项目中的多个模块使用。可以使用 declare global 来实现。

`在一个全局声明文件中，如 globals.d.ts`
declare global {
	var globalVar: number
	function globalFunction(): void
}

`现在 globalVar 和 globalFunction 可以在任何地方使用`
globalVar = 42
globalFunction()

告别手动引入依赖

1、package.json

package.json

"devDependencies": {
	...其他依赖
	"unplugin-auto-import": "^0.5.11",
	...其他依赖
}

2、src/auto-imports.d.ts

项目的 src/auto-imports.d.ts 文件

// Generated by 'unplugin-auto-import'
// We suggest you to commit this file into source control

declare global {
  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 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 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 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 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 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']
}

3、`vite.config.ts

vite.config.ts 文件

import AutoImport from 'unplugin-auto-import/vite'

plugins: [
	vue(),
	vueJsx(),
	AutoImport({
			dts: 'src/auto-imports.d.ts',
			imports: ['vue', 'vue-router'],
	
			eslintrc: {
				enabled: true,
				filepath: './.eslintrc-auto-import.json',
				globalsPropValue: true,
			},
	}),
]，

resolve: {
	alias: {
		'@': fileURLToPath(new URL('./src/', import.meta.url)),
	},
},

server: {
	hmr: true,
	watch: {
		usePolling: true,   // 修复HMR热更新失效
	},
	//vue3 vite配置热更新不用手动刷新
},