Uncaught TypeError: Cannot read properties of undefined (reading ‘_modulesNamespaceMap‘)_runtime-core.esm-bundler.js:221 uncaught typeerror-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_40945354/article/details/123290343

在使用Vue.js开发过程中遇到一个运行时错误：Uncaught TypeError，指出无法读取undefined的'_modulesNamespaceMap'属性。这个问题可能源于组件或模块未正确导入或初始化。解决方法包括检查导入路径、确保Vue实例已正确挂载，以及排查全局变量的定义。对Vue.js和JavaScript的深入理解是定位和修复此类错误的关键。

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[Vue warn]: Property "$store" was accessed during render but is not defined on instance. 
  at <Cart> 
  at <Header> 
  at <App>
warn @ runtime-core.esm-bundler.js?5c40:38
get @ runtime-core.esm-bundler.js?5c40:6755
mappedGetter @ vuex.esm-browser.js?5502:1235
run @ reactivity.esm-bundler.js?a1e9:167
get value @ reactivity.esm-bundler.js?a1e9:1101
get @ runtime-core.esm-bundler.js?5c40:2845
get @ runtime-core.esm-bundler.js?5c40:6707
render @ Cart.vue?b3b1:2
renderComponentRoot @ runtime-core.esm-bundler.js?5c40:893
componentUpdateFn @ runtime-core.esm-bundler.js?5c40:5030
run @ reactivity.esm-bundler.js?a1e9:167
setupRenderEffect @ runtime-core.esm-bundler.js?5c40:5156
mountComponent @ runtime-core.esm-bundler.js?5c40:4939
processComponent @ runtime-core.esm-bundler.js?5c40:4897
patch @ runtime-core.esm-bundler.js?5c40:4489
mountChildren @ runtime-core.esm-bundler.js?5c40:4685
mountElement @ runtime-core.esm-bundler.js?5c40:4594
processElement @ runtime-core.esm-bundler.js?5c40:4566
patch @ runtime-core.esm-bundler.js?5c40:4486
componentUpdateFn @ runtime-core.esm-bundler.js?5c40:5037
run @ reactivity.esm-bundler.js?a1e9:167
setupRenderEffect @ runtime-core.esm-bundler.js?5c40:5156
mountComponent @ runtime-core.esm-bundler.js?5c40:4939
processComponent @ runtime-core.esm-bundler.js?5c40:4897
patch @ runtime-core.esm-bundler.js?5c40:4489
mountChildren @ runtime-core.esm-bundler.js?5c40:4685
processFragment @ runtime-core.esm-bundler.js?5c40:4856
patch @ runtime-<