在JavaScript中,"block-scoped variable"指的是那些在代码块(由{}包围的区域)内声明的变量。这些变量使用let或const关键字进行声明,与使用var声明的函数作用域或全局作用域的变量不同。let和const声明的变量仅在声明它们的代码块及其子代码块中可用。 描述在什么情况下会出现“cannot redeclare block-scoped variable”...
方法一、将运行环境由DOM typings更改成其他运行环境 可以在tsconfig.json中做一下声明: 方法二、将脚本封装到模块内,模块由自己的作用域,自然不会与全局作用域的变量冲突。 在typescript中,只要文件存在import或export关键字,都被视为module 我们在脚本的最后一行,添加export {} 将文件声明为module即可。
Bug Report 🔎 Search Terms error TS2451: Cannot redeclare block-scoped variable 🕗 Version & Regression Information This is the behavior in every version I tried, and I reviewed the FAQ for entries about block-scoped variables and shadowin...
问题:vscode中编写typescript文件,提示错误Cannot redeclare block-scoped variable 'XXX'.ts(2451) 分析:这被认为是设计上的问题。typescript使用DOM typings作为全局执行上下文。全局环境下就极有可能随时出现命名问题,所以typescript会提示这样的错误。 解决:有两种解决方法 使当前文件被视为模块文件,如果没有中确实不...
cannot redeclare block-scoped variable 解决办法 检查是否集成了 Vetur 插件,若存在禁用或卸载即可,该插件Vue3.0 的时候会冲突; Vue3.0 集成如下两款即可: 一、名称: TypeScript Vue Plugin (Volar) ID: Vue.vscode-typescript-vue-plugin 说明: Vue Plugin for TypeScript server ...
Q: How can I avoid the "Cannot redeclare block-scoped variable" error? A: To avoid this error, ensure you're not trying to redeclare aletorconstvariable within the same block scope. If you need to use the same variable name, you can either change the scope of the variable or usevarin...
官方的解释: Typescript is moduler and each module has it’s own block. So, basically if you could somehow enclose the variable which is declared as let within it’s own module, the error will be resolved because now your let variable is in it’s separate block. ...
Cannot redeclare block-scoped variable 'name'. constname="Matt"; We've only got onenamein our file, so what's going on? This is happening for two reasons. First, our file doesn't have any imports or exports in it. If we add an empty export, the error goes away: ...
解决typescript Cannot redeclare block-scoped variable 没有依赖框架来写typescript,纯粹新建一个ts文件,使用tsc编译成js后,ts文件里的声明的变量、函数名都会报错: Duplicate identifier | Duplicate function // 这是具名函数和class的报错 或者 Cannot redeclare block-scoped variable // 这是声明的变量报错...
angular 项目 error TS2451: Cannot redeclare block-scoped variable 'ngDevMode' 删除node_modules ,用 npm install 就可以了,cnpm install (竟然不行)