Angular 2 高级配置
在本章中，我们将查看 Angular 2 项目中的其他配置文件。
tsconfig.json
该文件用于提供有关用于 Angular JS 项目的 TypeScript 的选项。
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"lib": [ "es2015", "dom" ],
"noImplicitAny": true,
"suppressImplicitAnyIndexErrors": true
}
}
以下是有关上述代码的一些要点。
-
编译的目标是 es5，这是因为大多数浏览器只能理解 ES5 typescript。
-
sourceMap 选项用于生成 Map 文件，这在调试时很有用。因此，在开发过程中，最好将此选项保持为真。
-
Angular JS 装饰器需要 "emitDecoratorMetadata": true 和 "experimentalDecorators": true 。如果没有到位，Angular JS 应用程序将无法编译。
包.json
该文件包含有关 Angular 2 项目的信息。以下是文件中的典型设置。
{
"name": "angular-quickstart",
"version": "1.0.0",
"description": "QuickStart package.json from the documentation,
supplemented with testing support",
"scripts": {
"build": "tsc -p src/",
"build:watch": "tsc -p src/ -w",
"build:e2e": "tsc -p e2e/",
"serve": "lite-server -c=bs-config.json",
"serve:e2e": "lite-server -c=bs-config.e2e.json",
"prestart": "npm run build",
"start": "concurrently \"npm run build:watch\" \"npm run serve\"",
"pree2e": "npm run build:e2e",
"e2e": "concurrently \"npm run serve:e2e\" \"npm run protractor\"
--killothers --success first",
"preprotractor": "webdriver-manager update",
"protractor": "protractor protractor.config.js",
"pretest": "npm run build",
"test": "concurrently \"npm run build:watch\" \"karma start karma.conf.js\"",
"pretest:once": "npm run build",
"test:once": "karma start karma.conf.js --single-run",
"lint": "tslint ./src/**/*.ts -t verbose"
},
"keywords": [],
"author": "",
"license": "MIT",
"dependencies": {
"@angular/common": "~2.4.0",
"@angular/compiler": "~2.4.0",
"@angular/core": "~2.4.0",
"@angular/forms": "~2.4.0",
"@angular/http": "~2.4.0",
"@angular/platform-browser": "~2.4.0",
"@angular/platform-browser-dynamic": "~2.4.0",
"@angular/router": "~3.4.0",
"angular-in-memory-web-api": "~0.2.4",
"systemjs": "0.19.40",
"core-js": "^2.4.1",
"rxjs": "5.0.1",
"zone.js": "^0.7.4"
},
"devDependencies": {
"concurrently": "^3.2.0",
"lite-server": "^2.2.2",
"typescript": "~2.0.10",
"canonical-path": "0.0.2",
"tslint": "^3.15.1",
"lodash": "^4.16.4",
"jasmine-core": "~2.4.1",
"karma": "^1.3.0",
"karma-chrome-launcher": "^2.0.0",
"karma-cli": "^1.0.1",
"karma-jasmine": "^1.0.2",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~4.0.14",
"rimraf": "^2.5.4",
"@types/node": "^6.0.46",
"@types/jasmine": "2.5.36"
},
"repository": {}
}
上面代码需要注意的一些关键点：
-
有两种类型的依赖，第一种是依赖，然后是开发依赖。在开发过程中需要开发者，而其他人则需要运行应用程序。
-
"build:watch": "tsc -p src/ -w" 命令用于通过查找打字稿文件中的更改来在后台编译打字稿。
systemjs.config.json
该文件包含 Angular JS 应用程序所需的系统文件。这将加载所有必要的脚本文件，而无需向 html 页面添加脚本标记。典型文件将具有以下代码。
/**
* System configuration for Angular samples
* Adjust as necessary for your application needs.
*/
(function (global) {
System.config ({
paths: {
// 路径作为别名
'npm:': 'node_modules/'
},
// map 告诉系统加载器在哪里寻找东西
map: {
// 我们的应用在 app 文件夹中
app: 'app',
// 角度束
'@angular/core': 'npm:@angular/core/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platformbrowser/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic':
'npm:@angular/platform-browserdynamic/bundles/platform-browser-dynamic.umd.js',
'@angular/http': 'npm:@angular/http/bundles/http.umd.js',
'@angular/router': 'npm:@angular/router/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
// 其他库
'rxjs': 'npm:rxjs',
'angular-in-memory-web-api':
'npm:angular-in-memory-web-api/bundles/inmemory-web-api.umd.js'
},
// packages 告诉系统加载器在没有文件名时如何加载
and/or no extension
packages: {
app: {
defaultExtension: 'js'
},
rxjs: {
defaultExtension: 'js'
}
}
});
})(this);
上面代码需要注意的一些关键点：
-
'npm:': 'node_modules/' 告诉我们项目中所有 npm 模块所在的位置。
-
app: 'app' 的映射告诉我们所有应用程序文件的加载文件夹。