在JavaScript中,出现“cannot access 'document' before initialization”错误通常是因为在脚本执行时,DOM还没有完全加载完成。 在JavaScript中,访问DOM元素(如document对象)之前,需要确保DOM已经完全加载。如果尝试在DOM加载完成之前访问document或其他DOM元素,就会遇到“cannot access 'document' before initialization”这样的...
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')) } 2、用ifrme来解决重复嵌套,缺点:用iframe 传递参数的话,...
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...
Error: 'stocks' cannot be accessed before initialization Question: I'm encountering an issue while importing an object into another JS file as the error message, Uncaught ReferenceError , keeps appearing, which says "Cannot access 'stocks' before initialization." Although I have properly declared an...
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。
Cannotaccessxxxbeforeinitialization 因为在变量未初始化的情况下就访问变量 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 function test() { console.log(b); // undefined console.log(a); // 报错(Cannot access 'a' before initializ...
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 ...
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...