Question

我想在使用angular-cli构建的 angular2项目中包含underscore.js 。直到现在我无法这样做。我到目前为止尝试过：

1- npm install underscore --save

2- tsd安装下划线

3- script src =＆＃34; node_modules / underscore / underscore.js＆＃34; ，在index.html中引用

4- inside system-config.js

/** Map relative paths to URLs. */
var map = {
    'underscore': '../node_modules/underscore/underscore.js'
};
/** User packages configuration. */
var packages = {
    'underscore': '../node_modules/underscore/underscore.js'
};

5- import * as _ from＆＃39; underscore＆＃39;;

但是下划线.js并没有被复制到＆＃39; dist＆＃39;目录在运行时，浏览器抱怨找不到underscore.js。我想我在第4点缺少一些东西。当我开始学习angular2时，非常感谢任何帮助。请记住，这个项目是由angular-cli制作的，而不是任何其他种子项目。除了Underscore.js，项目工作正常。

[编辑] package.json有＆＃34;下划线＆＃34;：＆＃34; ^ 1.8.3＆＃34;在依赖

Answer 1

使用Angular CLI 1.0.0-rc.1，此处描述了推荐的解决方案：

Angular2 2.4 How to load external libraries sush as Underscore into angular2.

npm install underscore --save // save to dependencies: required to run
npm install @types/underscore --save-dev // save to dev dependencies: required in dev mode

然后在你的组件类中：

import * as _ from 'underscore';
...
subtitle = _.head(['xyz'])

或者，还有另一种方法可以加载＆＃34;静态＆＃34; angular-cli中的脚本如此处所述https://www.npmjs.com/package/angular-cli#global-library-installation：

在.angular-cli.json中，将其添加到scripts数组中：

"scripts": ["../node_modules/underscore/underscore.js"]

这将加载underscore.js，但这不是一个让它可用于你的打字稿类的好方法。

Answer 2

使用npm安装下划线转到yourappname / src / typings.d.ts并添加此行 RewriteEngine On # redirect home page to http:// RewriteCond %{HTTPS} on RewriteRule ^/?$ http://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE] # redirect anything but home page to https:// RewriteCond %{HTTPS} off RewriteCond %{THE_REQUEST} !^[A-Z]{3,}\s/+[\s?] [NC] RewriteRule . https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE] # rest of your rules go here 然后运行ng build

Answer 3

Angular 2完整3个文件片段

的package.json

    {
  "name": "angular2-quickstart",
  "version": "1.0.0",
  "scripts": {
    "start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\" ",
    "lite": "lite-server",
    "postinstall": "typings install",
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "typings": "typings"
  },
  "license": "ISC",
  "dependencies": {
    "@angular/common": "2.0.0",
    "@angular/compiler": "2.0.0",
    "@angular/core": "2.0.0",
    "@angular/forms": "2.0.0",
    "@angular/http": "2.0.0",
    "@angular/platform-browser": "2.0.0",
    "@angular/platform-browser-dynamic": "2.0.0",
    "@angular/router": "3.0.0",
    "@angular/upgrade": "2.0.0",
    "angular2-in-memory-web-api": "0.0.20",
    "bootstrap": "^3.3.6",
    "core-js": "^2.4.1",
    "reflect-metadata": "^0.1.3",
    "rxjs": "5.0.0-beta.12",
    "systemjs": "0.19.27",
    "tsd": "^0.6.5",
    "underscore": "^1.8.3",
    "zone.js": "^0.6.23"
  },
  "devDependencies": {
    "concurrently": "^2.2.0",
    "lite-server": "^2.2.2",
    "typescript": "^2.0.2",
    "typings": "^1.3.2"
  }
}

systemjs.config.js

/**
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
  System.config({
    paths: {
      // paths serve as alias
      'npm:': 'node_modules/'
    },
    // map tells the System loader where to look for things
    map: {
      // our app is within the app folder
      app: 'app',
      // angular bundles
      '@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/platform-browser/bundles/platform-browser.umd.js',
      '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/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',
      // other libraries
      'rxjs':                       'npm:rxjs',
      'underscore':                 'npm:underscore',

      'angular2-in-memory-web-api': 'npm:angular2-in-memory-web-api',
    },
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: {
        main: './main.js',
        defaultExtension: 'js'
      },


      rxjs: {
        defaultExtension: 'js'
      },
      'underscore':{
       main: './underscore.js', 
       defaultExtension: 'js'
       },
      'angular2-in-memory-web-api': {
        main: './index.js',
        defaultExtension: 'js'
      }
    }
  });
})(this);

tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  }
}

typings.json

{
  "globalDependencies": {
    "core-js": "registry:dt/core-js#0.0.0+20160725163759",
    "jasmine": "registry:dt/jasmine#2.2.0+20160621224255",
    "node": "registry:dt/node#6.0.0+20160909174046"
  },
  "ambientDependencies": {
    "underscore": "github:DefinitelyTyped/DefinitelyTyped/underscore/underscore.d.ts#f0990e288ac73d593e982995947567aa2643b828"
  }
}

1- npm安装下划线--save 2- tsd安装下划线（如果tsd没有安装第一次安装那个） 3）现在做npm安装 4）然后npm开始

Answer 4

安装下划线：

npm i underscore --save

在angular-cli.json中：

"scripts": [
        "../node_modules/underscore/underscore-min.js",
         ...
      ],

运行命令后

：

ng build

组件中的

：

declare var _: any;
@Component({...})

Answer 5

你的项目中是否有一个名为Package.json的文件？如果是，您可以尝试添加此行

"underscore": "^1.8.3",

在此文件的依赖项中。

system-config.ts中的修改

var map = {

    "underscore": "node_modules/underscore",

  };

var packages = {
    'underscore':            { main: 'index.js', defaultExtension: 'js' }
  };

  var packageNames = [
    '@angular/common',
    '@angular/compiler',
    '@angular/core',
    '@angular/http',
    '@angular/platform-browser',
    '@angular/platform-browser-dynamic',
    '@angular/router-deprecated',
    '@angular/testing',
    '@angular/upgrade',
  ];

packageNames.forEach(function(pkgName) {
    packages[pkgName] = { main: 'index.js', defaultExtension: 'js' };
  });

var config = {
    map: map,
    packages: packages,
    paths: {
      "underscore": "/node_modules/underscore.js"
    }
  };

然后在那之后进行npm安装。

Answer 6

我想你可能错过了一步？你还记得在“angular-cli-build.js”文件中设置下划线吗？这一步告诉clingon将下划线放在供应商文件夹（/ dist / vendor）中。

以下是我如何使用下划线工作。

安装下划线和打字：

npm install underscore --save
typings install underscore --save --ambient

在“angular-cli-build.js”中设置下划线：

module.exports = function(defaults) {
  return new Angular2App(defaults, {
    vendorNpmFiles: [
      'systemjs/dist/system-polyfills.js',
      'systemjs/dist/system.src.js',
      'zone.js/dist/**/*.+(js|js.map)',
      'es6-shim/es6-shim.js',
      'reflect-metadata/**/*.+(js|js.map)',
      'rxjs/**/*.+(js|js.map)',
      '@angular/**/*.+(js|js.map)',
      'moment/moment.js',
      'underscore/underscore.js'
    ]
  });
};

然后下划线被编译到供应商文件夹（/ dist / vendor），现在可以从system.config.ts文件指向这个位置：

const map: any = {
  "underscore": "vendor/underscore/underscore.js",
  "moment": "vendor/moment/moments.js"
};

/** User packages configuration. */
const packages: any = {
  'underscore': {
    format: 'cjs'
  },
  'moment': {
    format: 'cjs'
  }
};

请记住使用包含.js的孔路径，希望这有助于：）

我从文档：https://github.com/angular/angular-cli/wiki/3rd-party-libs

Answer 7

我使用的是Angular-cli，我所做的就是在package.json中添加这一行

"underscore": "^1.8.3",

然后我跑：
1. npm install underscore --save
2. npm install

它有效......

如何在使用angular-cli

7 个答案: