Vue+ts项目导入Js文件方法
修改 tsconfig.json
{ "compilerOptions": { "target": "esnext", "module": "esnext", "strict": true, "jsx": "preserve", "importHelpers": true, "moduleResolution": "node", "experimentalDecorators": true, "skipLibCheck": true, "esModuleInterop": true, "allowJs": true, // 允许js "allowSyntheticDefaultImports": true, "noImplicitAny": false, // 不进行any语法检查 "sourceMap": true, "baseUrl": ".", "types": [ "webpack-env" ], "paths": { "@/*": [ "src/*" ] }, "lib": [ "esnext", "dom", "dom.iterable", "scripthost" ] }, "include": [ "src/**/*.js", // 导入js "src/**/*.ts", "src/**/*.tsx", "src/**/*.vue", "tests/**/*.ts", "tests/**/*.tsx", "public/config.js" // 导入js ], "exclude": [ "node_modules" ] }
oImplicitAny编译器选项所做的,基本上是将TypeScript从可选类型语言转换为强制类型检验语言。
简单的:
function logMe(x) { console.log(x); } // error TS7006: Parameter 'x' implicitly has an 'any' type.
也将报错——你必须明确声明x
的类型为any
:
function logMe(x: any) { console.log(x); } // OK
这意味着,如果你要把现有的JS代码库迁移到TS,那除了更改文件扩展名,你还得做一些较复杂的东西。这还意味着,在编写代码时,您需要更多地关注类型,如果不指定类型,编译器就总是会「抱怨」。