TypeScript Compile Options

青旅半醒 2022-11-18 13:36 102阅读 0赞

# Compile Options #

## 1. `-w`, `--watch` ##

Watch input files.

> Run the compiler in monitor mode. The output files will be monitored, and when source files changes, they will be recompiled automatically.

# monitor test.ts
    tsc -w test.ts
    
    # monitor every files
    tsc -w

## 2. `tsconfig.json` Configuration File ##

`tsconfig.json` is the configuration file of TypeScript compiler. TypeScript compiler will compile the code according to the information in the configuration file.

{ 
        // tsconfig.json is the configuration file of TypeScript compiler. 
        // TypeScript compiler will compile the code according to the information in the configuration file.
        // include: need to compile
        "include": [
            "./**/*"
        ],
        // exclude: need not to compile
        "exclude": [
            ""
        ],
        // compiler option
        "compilerOptions": { 
            // compile target: Specify an ES version
            "target": "ES2015",
            // Specify the version of the modular specification.
            // "module": "es2015",
            // Specify library your project use
            "lib": [
                "ES6",
                "DOM"
            ],
            // outDir: Specify the directory of the compiled file.
            "outDir": "./dist",
            // outFile: Merge the code into one file.
            "outFile": "./dist/app.js",
            // allow JS: Whether to compile JS file.
            "allowJs": false,
            // checkJs: Whether to check JS grammar.
            "checkJs": false,
            // removeComments: Whether to remove comments.
            "removeComments": false,
            // Do not generate compiled file.
            "noEmit": false,
            // Do not generate compiled file when has error.
            "noEmitOnError": true,
            // Whether to open All Strict Mode, including the following four.
            "strict": true,
            // - Whether to use Strict Mode always.
            "alwaysStrict": true,
            // - Whether to don't allow to use 'any' implicitly.
            "noImplicitAny": true,
            // - Whether to don't allow to use 'this' implicitly.
            "noImplicitThis": true,
            // - Whether to check null value strictly.
            "strictNullChecks": true,
        }
    }