Angular2 - Angular-CLI 安装 lodash - 找不到模块

Question

Mac OSX El 头|角-cli：0.1.0 |节点：5.4.0 |操作系统：达尔文 x64

我尝试根据 angular-cli wiki：https://github.com/angular/angular-cli/wiki/3rd-party-libs 安装第 3 方 npm 模块，但失败了。我已经为此苦苦挣扎了好几天，如果有任何帮助，我将不胜感激。

获取错误的步骤：

ng new lodashtest3 cd lodashtest3 npm install lodash --save typings install lodash --ambient --save

angular-cli-build.json:

module.exports = function(defaults) { return new Angular2App(defaults, { vendorNpmFiles: [ ... 'lodash/**/*.js' ] }); }; ng build （lodash 被正确添加到 dist/vendor 中）

系统配置.ts：

/** Map relative paths to URLs. */
 const map: any = {
   'lodash': 'vendor/lodash/lodash.js'
 };

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

（全部按照规范中的 https://github.com/angular/angular-cli/wiki/3rd-party-libs) 注意 - 我在这里尝试了所有我能想到的配置设置，都给出了相同的结果。

lodashtest3.component.ts: import * as _ from 'lodash';

ng build

Could not start watchman; falling back to NodeWatcher for file system events.
Visit http://ember-cli.com/user-guide/#watchman for more info.
Build failed.
The Broccoli Plugin: [BroccoliTypeScriptCompiler] failed with:
Error: Typescript found the following errors:
  /Users/danielmattsson/git/lodashtest3/tmp/broccoli_type_script_compiler-input_base_path-g2lDIaq6.tmp/0/src/app/lodashtest3.component.ts (2, 20): Cannot find module 'lodash'.
    at BroccoliTypeScriptCompiler._doIncrementalBuild (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:115:19)
    at BroccoliTypeScriptCompiler.build (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:43:10)
    at /Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/broccoli-caching-writer/index.js:152:21
    at lib$rsvp$$internal$$tryCatch (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/broccoli-caching-writer/node_modules/rsvp/dist/rsvp.js:1036:16)
    at lib$rsvp$$internal$$invokeCallback (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/broccoli-caching-writer/node_modules/rsvp/dist/rsvp.js:1048:17)
    at lib$rsvp$$internal$$publish (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/broccoli-caching-writer/node_modules/rsvp/dist/rsvp.js:1019:11)
    at lib$rsvp$asap$$flush (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/broccoli-caching-writer/node_modules/rsvp/dist/rsvp.js:1198:9)
    at nextTickCallbackWith0Args (node.js:456:9)
    at process._tickCallback (node.js:385:13)

The broccoli plugin was instantiated at:
    at BroccoliTypeScriptCompiler.Plugin (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/broccoli-caching-writer/node_modules/broccoli-plugin/index.js:10:31)
    at BroccoliTypeScriptCompiler.CachingWriter [as constructor] (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/broccoli-caching-writer/index.js:21:10)
    at BroccoliTypeScriptCompiler (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:26:49)
    at Angular2App._getTsTree (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/lib/broccoli/angular2-app.js:280:18)
    at Angular2App._buildTree (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/lib/broccoli/angular2-app.js:101:23)
    at new Angular2App (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/lib/broccoli/angular2-app.js:42:23)
    at module.exports (/Users/danielmattsson/git/lodashtest3/angular-cli-build.js:6:10)
    at Class.module.exports.Task.extend.setupBroccoliBuilder (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/lib/models/builder.js:55:19)
    at Class.module.exports.Task.extend.init (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/lib/models/builder.js:89:10)
    at new Class (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/node_modules/core-object/core-object.js:18:12)
    at Class.module.exports.Task.extend.run (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/lib/tasks/build.js:15:19)
    at /Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/lib/commands/build.js:32:24
    at lib$rsvp$$internal$$tryCatch (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:1036:16)
    at lib$rsvp$$internal$$invokeCallback (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:1048:17)
    at /Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:331:11
    at lib$rsvp$asap$$flush (/Users/danielmattsson/git/lodashtest3/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:1198:9)

编辑：根据下面的 cmets 获得更多信息

dist/index.html:

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <title>Lodashtest3</title>
  <base href="/">

  <link rel="icon" type="image/x-icon" href="favicon.ico">
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <!-- Service worker support is disabled by default.
       Install the worker script and uncomment to enable.
       Only enable service workers in production.
  <script type="text/javascript">
    if ('serviceWorker' in navigator) {
      navigator.serviceWorker.register('/worker.js').catch(function(err) {
        console.log('Error installing service worker: ', err);
      });
    }
  </script>
  -->
</head>
<body>
  <lodashtest3-app>Loading...</lodashtest3-app>

  <script src="vendor/es6-shim/es6-shim.js"></script>
  <script src="vendor/reflect-metadata/Reflect.js"></script>
  <script src="vendor/systemjs/dist/system.src.js"></script>
  <script src="vendor/zone.js/dist/zone.js"></script>

  <script>
    System.import('system-config.js').then(function () {
      System.import('main');
    }).catch(console.error.bind(console));
  </script>
</body>
</html>

Answer 1

[更新答案] 新版之后angular-cli (1.0.0-beta.15):

添加

npm install lodash --save
npm install @types/lodash --save-dev

然后将库添加到 angular-cli.json 到全局脚本列表中（添加 "../node_modules/lodash/lodash.js" 到列表 apps[0].scripts）。

在你想要使用的组件中，试试这种方式

declare var _:any;

@Component({
})
export class YourComponent {
  ngOnInit() {
     console.log(_.chunk(['a', 'b', 'c', 'd'], 2));
  }
}

之前：angular-cli (1.0.0-beta.15):

在 src/index.html 中添加这一行

  <script src="/vendor/lodash/lodash.js" type="text/javascript"></script>

在你想要使用的组件中，试试这种方式

declare var _:any;

@Component({
})
export class YourComponent {
  ngOnInit() {
     console.log(_.chunk(['a', 'b', 'c', 'd'], 2));
  }
}

我立即尝试，它对我有用

Answer 2

为了在 Angular CLI 和 System.js 中支持第 3 方库，您必须在 system.config.ts 和 angular-cli-build.js 上手动指定它们。 我已经回答了here，并以lodash 和其他依赖项为例。

Answer 3

使用稳定版本和当前的 angular-cli (1.0.0-beta.15)，只需添加 npm 包和类型定义

npm install lodash --save
npm install @types/lodash --save-dev

对于 1.0.0-beta.15 等早期版本，需要下一个。当前版本不需要它：

将库添加到 angular-cli.json 到全局脚本列表（添加 "../node_modules/lodash/lodash.js" 到列表 apps[0].scripts）。

见https://github.com/angular/angular-cli#global-library-installation

Answer 4

FWIW，从今天开始 (1.0.0-beta.26)，不再需要添加 scripts 条目。

只需使用以下命令将正确的条目添加到package.json：

npm i --save lodash
npm i --save-dev @types/lodash

然后，在您的 TypeScript 代码中，使用：

import * as _ from 'lodash';

代码运行良好。

就我而言，实际上添加 scripts 条目会导致问题。

Answer 5

截至 2017 年 4 月 15 日，@angular/cli 1.0.0：

您需要非常明确您安装的版本，否则 TypeScript 绑定会导致各种故障。我所做的是在package.json 中更新我的devDependencies 如下：

"@types/lodash": "ts2.0"