typescript - 打字稿错误 TS2451:无法重新声明块范围变量“chai_1”
问题描述
这是我的演示仓库https://github.com/mareru/webdriverIO-shop-demo。
我正在使用 webdriverIOv6 和 Typescript v4。
运行后npm test
,我收到此错误:
src/pages/modules/headerModule.ts(4,7): error TS2451: Cannot redeclare block-scoped variable 'chai_1'.
src/pages/modules/headerModule.ts(5,7): error TS2451: Cannot redeclare block-scoped variable 'testingData_1'.
我尝试export {};
在我的文件顶部添加。
我尝试将其添加到tsconfig.json
文件中:
"moduleResolution": "node",
"resolveJsonModule": true,
"esModuleInterop": true
但没有任何帮助。
这是我的tsconfig.json
文件:
{
"compilerOptions": {
"baseUrl": ".",
"paths": {
"*": [
"./*"
],
"src/*": [
"./src/*"
],
"test/*": [
"src/step_definitions/*"
]
},
/* Basic Options */
"target": "es2016", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
"module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
// "lib": [], /* Specify library files to be included in the compilation. */
// "allowJs": true, /* Allow javascript files to be compiled. */
// "checkJs": true, /* Report errors in .js files. */
// "jsx": "preserve", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
// "declaration": true, /* Generates corresponding '.d.ts' file. */
// "sourceMap": true, /* Generates corresponding '.map' file. */
// "outFile": "./", /* Concatenate and emit output to single file. */
// "outDir": "./", /* Redirect output structure to the directory. */
// "rootDir": "./", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
// "removeComments": true, /* Do not emit comments to output. */
// "noEmit": true, /* Do not emit outputs. */
// "importHelpers": true, /* Import emit helpers from 'tslib'. */
// "downlevelIteration": true, /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
// "isolatedModules": true, /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
/* Strict Type-Checking Options */
"strict": true, /* Enable all strict type-checking options. */
"noImplicitAny": false, /* Raise error on expressions and declarations with an implied 'any' type. */
// "strictNullChecks": true, /* Enable strict null checks. */
// "strictFunctionTypes": true, /* Enable strict checking of function types. */
// "strictPropertyInitialization": true, /* Enable strict checking of property initialization in classes. */
// "noImplicitThis": true, /* Raise error on 'this' expressions with an implied 'any' type. */
// "alwaysStrict": true, /* Parse in strict mode and emit "use strict" for each source file. */
/* Additional Checks */
// "noUnusedLocals": true, /* Report errors on unused locals. */
// "noUnusedParameters": true, /* Report errors on unused parameters. */
// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
/* Module Resolution Options */
"moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
// "baseUrl": "./", /* Base directory to resolve non-absolute module names. */
// "paths": {}, /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
// "rootDirs": [], /* List of root folders whose combined content represents the structure of the project at runtime. */
// "typeRoots": [], /* List of folders to include type definitions from. */
"types": ["@wdio/sync","cucumber", "node", "@wdio/applitools-service"], /* Type declaration files to be included in compilation. */
"typeRoots": ["./types"],
"allowSyntheticDefaultImports": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
"esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
// "preserveSymlinks": true, /* Do not resolve the real path of symlinks. */
/* Source Map Options */
// "sourceRoot": "./", /* Specify the location where debugger should locate TypeScript files instead of source locations. */
// "mapRoot": "./", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true, /* Emit a single file with source maps instead of having a separate file. */
// "inlineSources": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
/* Experimental Options */
// "experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */
// "emitDecoratorMetadata": true, /* Enables experimental support for emitting type metadata for decorators. */
"resolveJsonModule": true
}
}
为什么我不能import {expect} from 'chai';
在我的.ts
文件中使用?
为什么我不能 import {testingData} from 'src/constants/testingData';
在我的.ts
文件中使用?
我在哪里重新声明这些变量,我只是导入并使用它们......
谢谢!
解决方案
这行:
require('ts-node').register({files: true});
在wdio.conf.ts
前面的函数中引起了麻烦。我不明白为什么会这样,但是一旦我将其注释掉,错误就消失了。
如果有人对此有深入的解释,请随时分享。
我希望这将帮助其他人努力解决这些错误。
谢谢!
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