TypeScript tsconfig.json(TypeScript配置)

胡振刚 發表於 2019-12-10 14:02:00

如果一个目录下存在一个<code>tsconfig.json</code>文件，那么意味着这个目录是TypeScript项目的根目录。 <code>tsconfig.json</code>文件中指定了用来编译这个项目的根文件和编译选项。一个项目可以通过以下方式之一来编译：
<ul>
<li>不带任何输入文件的情况下调用<code>tsc</code>，编译器会从当前目录开始去查找<code>tsconfig.json</code>文件，逐级向上搜索父目录。</li>
<li>不带任何输入文件的情况下调用<code>tsc</code>，且使用命令行参数<code>--project</code>（或<code>-p</code>）指定一个包含<code>tsconfig.json</code>文件的目录。</li>
</ul>
　　当命令行上指定了输入文件时，<code>tsconfig.json</code>文件会被忽略。
<h2>　　示例</h2>
<code>tsconfig.json</code>示例文件:
<ul>
<li>使用<code>"files"</code>属性</li>
</ul>
<div class="cnblogs_code">
<pre>{
"compilerOptions": {
 "module": "commonjs",
 "noImplicitAny": true,
 "removeComments": true,
 "preserveConstEnums": true,
 "sourceMap": true
},
"files": [
 "core.ts",
 "sys.ts",
 "types.ts",
 "scanner.ts",
 "parser.ts",
 "utilities.ts",
 "binder.ts",
 "checker.ts",
 "emitter.ts",
 "program.ts",
 "commandLineParser.ts",
 "tsc.ts",
 "diagnosticInformationMap.generated.ts"
]
}</pre>
</div>
<ul>
<li>使用<code>"include"</code>和<code>"exclude"</code>属性</li>
</ul>
<div class="cnblogs_code">
<pre>{
"compilerOptions": {
 "module": "system",
 "noImplicitAny": true,
 "removeComments": true,
 "preserveConstEnums": true,
 "outFile": "../../built/local/tsc.js",
 "sourceMap": true
},
"include": [
 "src/**/*"
],
"exclude": [
 "node_modules",
 "**/*.spec.ts"
]
}</pre>
</div>
　　
<h2>　　初始化tsconfig.json</h2>
<div class="cnblogs_code">
<pre>yarn tsc -init</pre>
</div>
初始化后文件结构如下：
<div class="cnblogs_code">
<pre>{
"compilerOptions": {
/* Basic Options */
// "incremental": true, /* Enable incremental compilation */
"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' 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. */
// "declarationMap": true, /* Generates a sourcemap for each 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. */
// "composite": true, /* Enable project compilation */
// "tsBuildInfoFile": "./", /* Specify file to store incremental compilation information */
// "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": true, /* 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. */
// "strictBindCallApply": true, /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
// "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": [], /* Type declaration files to be included in compilation. */
// "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. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */

/* 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. */

/* Advanced Options */
"forceConsistentCasingInFileNames": true/* Disallow inconsistently-cased references to the same file. */
}
}</pre>
</div>
　　我们主要讲解target、module、strict和esModuleInterop四个默认开启项
<ul>
<li>target：指TypeScript源代码编译后的JavaScript版本。</li>
<li>Module：当前代码的组织形式。</li>
<li>strict：指开启JavaScript的严格模式。</li>
<li>esModuleInterop：指允许从没有设置默认导出的模块中默认导入。这并不影响代码的显示，仅为了类型检查。</li>
</ul>
测试 
来源：https://www.cnblogs.com/fanqisoft/p/12016249.html

頁: [1]

琼殿技术论坛's Archiver

TypeScript tsconfig.json(TypeScript配置)