解决 vue2.7使用 pnpm 和 pinia 2.x hasInjectionContext 报错

[sweetwisdom]

看了很多帖子，都说和vue2.7 不兼容，需要降级到2.0.x,但还是没有效果，pinia 2.x的最后更新版本也支持2.7,使用yarn可以运行，使用pnpm就报错

https://github.com/vuejs/pinia/blob/v2/packages/pinia/CHANGELOG.md

2.3.1 (2025-01-20)
Bug Fixes
types: support for Vue 2.7 (d14e1a7)

环境说明

package.json

 "dependencies": {
    "pinia": "2.3.1",
    "vue": "2.7.16"
  }

报错信息

报错关键字：export 'hasInjectionContext' (imported as 'hasInjectionContext')
报错信息：

error   Build errors: 
  ./node_modules/.pnpm/pinia@2.3.1_vue@2.7.16/node_modules/pinia/dist/pinia.mjs ×

File: ./node_modules/.pnpm/pinia@2.3.1_vue@2.7.16/node_modules/pinia/dist/pinia.mjs:1726:27-46
  × ESModulesLinkingError: export 'hasInjectionContext' (imported as 'hasInjectionContext') was not found in 'vue-demi' (possible exports: EffectScope, Vue, Vue2, computed, customRef, defineAsyncComponent, defineComponent, del, effectScope, getCurrentInstance, getCurrentScope, h, inject, install, isProxy, isReactive, isReadonly, isRef, isShallow, isVue2, isVue3, markRaw, mergeDefaults, nextTick, onActivated, onBeforeMount, onBeforeUnmount, onBeforeUpdate, onDeactivated, onErrorCaptured, onMounted, onRenderTracked, onRenderTriggered, onScopeDispose, onServerPrefetch, onUnmounted, onUpdated, provide, proxyRefs, reactive, readonly, ref, set, shallowReactive, shallowReadonly, shallowRef, toRaw, toRef, toRefs, triggerRef, unref, useAttrs, useCssModule, useCssVars, useListeners, useSlots, version, watch, watchEffect, watchPostEffect, watchSyncEffect)
      ╭─[1726:27]
 1724 │     }
 1725 │     function useStore(pinia, hot) {
 1726 │         const hasContext = hasInjectionContext();
      ·                            ───────────────────
 1727 │         pinia =
 1728 │             // in test mode, ignore the argument provided as we can always retrieve a
      ╰────
Import traces (entry → error):

问题分析

由于 vue-demi 被 Ignored build scripts（忽略了构建脚本），它无法执行安装后的 postinstall 脚本。

为什么这会导致报错？
vue-demi 是 Pinia 兼容 Vue 2 和 Vue 3 的核心桥梁。它在安装时需要运行一个脚本来检测你当前项目是 Vue 2 还是 Vue 3，并据此“切换”导出的 API。

因为 pnpm 默认禁用了未授权的脚本运行，vue-demi 没能成功切换。

结果它默认指向了 Vue 3 的导出路径，导致 Pinia 去调用 Vue 2.7 根本不存在的 hasInjectionContext，从而引发了你看到的错误。

解决办法

授权并重新构建
在终端运行以下命令：

pnpm approve-builds

空格选中 vue-demi

pnpm approve-builds
√ Choose which packages to build (Press <space> to select, <a> to toggle all, <i> to invert selection) · vue-demi
√ The next packages will now be built: vue-demi.
Do you approve? (y/N) · true
node_modules/.pnpm/vue-demi@0.14.10_vue@2.7.16/node_modules/vue-demi: Running postinstall script, done in 127ms

再次执行pnpm dev 即可

[posva]

Because hasInjectionContext is only available through vue-demi.