@文心快码cannot access ' ' before initialization 文心快码 当你在JavaScript或其他编程语言中遇到“cannot access ' ' before initialization”的错误时,这通常意味着你试图在一个变量被初始化之前就访问它。这个问题通常发生在以下几种情况: 变量声明和初始化顺序问题: 在JavaScript中,尤其是在使用
ReferenceError: Cannot access 'name' before initialization 这个实践无法明确说明 let 声明是否会提升的问题。我的唯一标准失效了。正当我束手无策时,突然考虑到翻译过程的误差,抱着试试看的心态查看了 mdn 文档英文版,说明如下: let bindings are created at the top of the (block) scope containing the declar...
在使用let以及const声明变量不会提升,所以就会抛错,而使用var声明的变量,会声明提升,所以会打印出undefined functiontest() { console.log(b);//undefinedconsole.log(a);//报错(Cannot access 'a' before initialization)let a = 'a';varb = 'b'; } test()...
ReferenceError: Cannot access ‘xxxx‘ before initialization ,原因之前已经初始化过,但页面组件嵌套,需要被重复引用。 1、开启异步引用来解决 components:{DeviceManage:defineAsyncComponent(()=>import('@/views/operation/mechanism/index.vue'))} 1. 2. 3. 2、用ifrme来解决重复嵌套,缺点:用iframe 传递参数的...
本地能正常跑起来,有警告vue-router.esm.js?8c4f:16 [vue-router] Duplicate named routes definition: { name: "login", path: "/login" }.用webpack4打生产包后,打开index.html报错Cannot access 'jt' before initialization.进入打包后的js文件查看了一下'jt'指的是constantRoutes,即常规的路由,不是...
ReferenceError: Cannot access ‘xxxx‘ before initialization ,原因之前已经初始化过,但页面组件嵌套,需要被重复引用。 1、开启异步引用来解决 components: { DeviceManage: defineAsyncComponent (()=> import('@/views/operation/mechanism/index.vue'))
开发过程中发现热更新无效,控制台输出如下错误ReferenceError: Cannot access 'xxx' before initialization [hmr] Failed to reload xxx. This could be due to syntax errors or importing non-existent…
This is myapp.js: importrouterfrom'./plugins/router';...constapp=createApp(AppRoot);app.use(router);// <--- Here is the problem :( With that configuration, it throws: Uncaught ReferenceError: Cannot access 'router' before initialization ...
letmyname='kaimo666' { console.log(myname) letmyname='kaimo777' } 1. 2. 3. 4. 5. 最终打印结果 分析原因 在块作用域内,let声明的变量被提升,但变量只是创建被提升,初始化并没有被提升,在初始化之前使用变量,就会形成一个暂时性死区。
本地能正常跑起来,有警告vue-router.esm.js?8c4f:16 [vue-router] Duplicate named routes definition: { name: "login", path: "/login" }.用webpack4打生产包后,打开index.html报错Cannot access 'jt' before initialization.进入打包后的js文件查看了一下'jt'指的是constantRoutes,即常规的路由,不是...