安装新的角度模块时出现 nomod 错误

Question

当我尝试将 braintree-angular 包含到我的 gulp-angular 项目中时，我收到以下错误：

Uncaught Error: [$injector:modulerr] Failed to instantiate module notecards due to:
Error: [$injector:modulerr] Failed to instantiate module braintree-angular due to:
Error: [$injector:nomod] Module 'braintree-angular' is not available! You either misspelled the module name or forgot to load it. If registering a module ensure that you specify the dependencies as the second argument.

我经常在 gulp-angular 项目中加载新安装的模块时遇到问题，我相信这是因为对 gulp 的工作原理缺乏了解。这个项目的 gulp 部分是由一位同事设置的。如果有人能解释为什么我继续看到这样的问题，将不胜感激！

我已经检查了以下内容：

• 模块已正确安装在我的/node_modules 文件夹中。
• 该模块在我的package.json 中正确显示。
• 整个文件夹都是可读的（我之前遇到过文件权限问题导致此问题。这里不是这种情况。）
• braintree-angular 文件没有被 gulp 加载。

gulp/server.js

'use strict';

var path = require('path');
var gulp = require('gulp');
var conf = require('./conf');
//var babel = require('gulp-babel');

var browserSync = require('browser-sync');
var browserSyncSpa = require('browser-sync-spa');

var util = require('util');

var proxyMiddleware = require('http-proxy-middleware');

function browserSyncInit(baseDir, browser) {
    browser = browser === undefined ? 'default' : browser;

    var routes = null;
    if (baseDir === conf.paths.src || (util.isArray(baseDir) && baseDir.indexOf(conf.paths.src) !== -1)) {
        routes = {
            '/bower_components': 'bower_components'
        };
    }

    var server = {
        baseDir: baseDir,
        routes : routes
    };

    /*
     * You can add a proxy to your backend by uncommenting the line below.
     * You just have to configure a context which will we redirected and the target url.
     * Example: $http.get('/users') requests will be automatically proxified.
     *
     * For more details and option, https://github.com/chimurai/http-proxy-middleware/blob/v0.9.0/README.md
     */
    // server.middleware = proxyMiddleware('/users', {target: 'http://jsonplaceholder.typicode.com', changeOrigin: true});

    browserSync.instance = browserSync.init({
        startPath: '/',
        server   : server,
        browser: browser,
        host: '192.168.0.20',
        https: false,
        port   : parseInt(process.env.GULP_PORT) || 8684
    });
}

browserSync.use(browserSyncSpa({
    selector: '[ng-app]'// Only needed for angular apps
}));

gulp.task('serve', ['watch'], function () {
    browserSyncInit([path.join(conf.paths.tmp, '/serve'), conf.paths.src]);
});

gulp.task('serve:dist', ['build'], function () {
    browserSyncInit(conf.paths.dist);
});

gulp.task('serve:e2e', ['inject'], function () {
    browserSyncInit([conf.paths.tmp + '/serve', conf.paths.src], []);
});

gulp.task('serve:e2e-dist', ['build'], function () {
    browserSyncInit(conf.paths.dist, []);
});

var gulp = require('gulp');
var webserver = require('gulp-webserver');

gulp.task('webserver', function() {
  gulp.src('src')
    .pipe(webserver({
      host: '0.0.0.0',
      livereload: true,
      directoryListing: true,
      open: true
    }));
});

gulpfile.js

/**
 *  Welcome to your gulpfile!
 *  The gulp tasks are splitted in several files in the gulp directory
 *  because putting all here was really too long
 */

'use strict';

var gulp = require('gulp');
var wrench = require('wrench');

/**
 *  This will load all js or coffee files in the gulp directory
 *  in order to load all gulp tasks
 */
wrench.readdirSyncRecursive('./gulp').filter(function (file) {
    return (/\.(js|coffee)$/i).test(file);
}).map(function (file) {
    require('./gulp/' + file);
});


/**
 *  Default task clean temporaries directories and launch the
 *  main optimization build task
 */
gulp.task('default', ['clean'], function () {
    gulp.start('build');
});

package.json

{
  "name": "healthbydna",
  "version": "0.0.0",
  "dependencies": {
    "angular-chart.js": "^1.0.3",
    "babel": "^6.5.2",
    "braintree-angular": "^1.5.0",
    "gulp-babel": "^6.1.2",
    "gulp-extend": "^0.2.0",
    "gulp-if": "^2.0.0",
    "gulp-ng-constant": "^1.1.0",
    "jotted": "^1.5.1",
    "lazypipe": "^1.0.1"
  },
  "scripts": {
    "test": "gulp test"
  },
  "devDependencies": {
    "babel-core": "^6.21.0",
    "babel-preset-es2015": "^6.18.0",
    "babel-preset-es2016": "^6.16.0",
    "browser-sync": "~2.9.11",
    "browser-sync-spa": "~1.0.3",
    "chalk": "~1.1.1",
    "del": "~2.0.2",
    "eslint-plugin-angular": "~0.12.0",
    "estraverse": "~4.1.0",
    "gulp": "^3.9.1",
    "gulp-angular-filesort": "~1.1.1",
    "gulp-angular-templatecache": "~1.8.0",
    "gulp-autoprefixer": "~3.0.2",
    "gulp-eslint": "~1.0.0",
    "gulp-filter": "~3.0.1",
    "gulp-flatten": "~0.2.0",
    "gulp-inject": "~3.0.0",
    "gulp-load-plugins": "~0.10.0",
    "gulp-minify-css": "~1.2.1",
    "gulp-minify-html": "~1.0.4",
    "gulp-ng-annotate": "~1.1.0",
    "gulp-protractor": "~1.0.0",
    "gulp-rename": "~1.2.2",
    "gulp-replace": "~0.5.4",
    "gulp-rev": "~6.0.1",
    "gulp-rev-replace": "~0.4.2",
    "gulp-sass": "~2.0.4",
    "gulp-size": "~2.0.0",
    "gulp-sourcemaps": "~1.6.0",
    "gulp-uglify": "~1.4.1",
    "gulp-useref": "~1.3.0",
    "gulp-util": "~3.0.6",
    "gulp-webserver": "^0.9.1",
    "http-proxy-middleware": "~0.9.0",
    "karma": "~0.13.10",
    "karma-angular-filesort": "~1.0.0",
    "karma-coverage": "~0.5.2",
    "karma-jasmine": "~0.3.6",
    "karma-ng-html2js-preprocessor": "~0.2.0",
    "karma-phantomjs-launcher": "~0.2.1",
    "lodash": "~3.10.1",
    "main-bower-files": "~2.9.0",
    "phantomjs": "~1.9.18",
    "uglify-save-license": "~0.4.1",
    "wiredep": "~2.2.2",
    "wrench": "~1.5.8"
  },
  "engines": {
    "node": ">=0.10.0"
  }
}

Answer 1

Gulp 只是一个（非常强大的）任务运行器，简单明了。它会做你可以自己做的事情，但你没有时间；）

Node 模块与 Angular 模块不同。 Node 模块的范围很广，用于在 Node.js 平台上运行通用代码。也就是说，在典型的网络浏览器设置之外运行的 Javascript。例如桌面应用程序、贷款计算器、网络服务器、聊天程序等。

但是，许多 Node 模块专门用于 Angular，并且有 Bower 对应部分。 Bower 包确实可以直接包含在您的网页中：

<script src="./bower_components/path/to/script.js" type="text/javascript"></script>

您可能会问，为什么 Web 模块同时存在 Node 模块和 Bower 包？这是因为 Browserify 和 Webpack 之类的打包工具让您可以在网页中实际使用 Node 模块。您的项目似乎没有为捆绑器设置。

您想要为您的模块获取已编译的 js（最好通过修改 gulpfile 来编译和/或连接节点模块文件夹中的正确 JS 文件）或使用 Bower 下载已编译的 JS，并修改 gulp文件以将其包含在连接过程中。

有多个文件构成了您项目的 Gulp 流程。在其中一个文件中查找“构建”任务。它应该包括有关如何构建供应商 JS 文件的详细信息。您想修改它，使其包含braintree-angular 的JS 文件的路径（如果存在）

Answer 2

好的，解决这个非常具体的问题是从 node_modules 中删除 Braintree-angular 并通过 bower 安装它。我还需要将版本锁定为v1.3.0。我不确定为什么会修复它，所以解释一下会很好:)

Answer 3

Gulp 与 Angular 模块无关。从您发布的任务中，它仅用于本地主机开发和构建，不用于任何依赖注入。

您的问题可能来自不需要模块的依赖关系。你的 app.module 应该看起来像这样。

angular.module('app', [
    'angular-svg-round-progress'
]);

还要确保在您的应用程序之前加载模块，否则实例化将失败。