所以，我升级到angular 4+，只是为了利用通用包进行服务器端渲染来实现SEO目的。我通过将现有的angular 2+项目升级到angular 4+并从https://github.com/evertonrobertoauler/cli-universal-demo/commit/a2610286bd3db5d4f4cce4318d7c220c11963eb6进行所有必要的配置来实现这一点。
只有一个区别，我使用的是ng-bootstraphttps://ng-bootstrap.github.io/#/home(v1.0.0-alpha.22)。但是当我使用npm run start-u-dev运行节点服务器时，在ng-bootstrap中的import关键字中出现了错误。
这是我的 package.json 文件内容：
只有一个区别，我使用的是ng-bootstraphttps://ng-bootstrap.github.io/#/home(v1.0.0-alpha.22)。但是当我使用npm run start-u-dev运行节点服务器时，在ng-bootstrap中的import关键字中出现了错误。
app-ui@0.0.0 start-u-dev /Users/giric/Projects/apnaDoctor/webapp/appUI
ts-node src/server.ts
/appUI/node_modules/@ng-bootstrap/ng-bootstrap/accordion/accordion.module.js:1
(function (exports, require, module, __filename, __dirname) { import { NgModule } from '@angular/core';
^^^^^^
SyntaxError: Unexpected token import
at createScript (vm.js:53:10)
at Object.runInThisContext (vm.js:95:10)
at Module._compile (module.js:543:28)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/appUI/dist/ngfactory/src/app/app.server.module.ngfa
ctory.ts:18:1)
at Module._compile (module.js:571:32)
at Module.m._compile (/appUI/node_modules/ts-node/src/index.ts:406:23)
at Module._extensions..js (module.js:580:10)
at Object.require.extensions.(anonymous function) [as .ts]
(/webapp/appUI/node_mod
ules/ts-node/src/index.ts:409:12)
at Module.load (module.js:488:32)
pm ERR! Darwin 16.6.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "start-u-dev"
npm ERR! node v7.7.4
npm ERR! npm v4.1.2
npm ERR! code ELIFECYCLE
npm ERR! app-ui@0.0.0 start-u-dev: `ts-node src/server.ts`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the app-ui@0.0.0 start-u-dev script 'ts-node src/server.ts'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the app-ui package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! ts-node src/server.ts
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs app-ui
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls app-ui
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
这是我的 package.json 文件内容：
{
"name": "app-ui",
"version": "0.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e",
"prestart": "npm install",
"postinstall": "bower install",
"prestart-u-dev": "npm install && ng build && ngc",
"start-u-dev": "ts-node src/server.ts",
"prestart-u-prod": "npm install && ng build --prod && ngc",
"start-u-prod": "ts-node src/server.ts"
},
"private": true,
"dependencies": {
"@angular/animations": "^4.0.1",
"@angular/cli": "^1.0.0-rc.1",
"@angular/common": "^4.0.1",
"@angular/compiler": "^4.0.1",
"@angular/compiler-cli": "^4.0.1",
"@angular/core": "^4.0.1",
"@angular/forms": "^4.0.1",
"@angular/http": "^4.0.1",
"@angular/platform-browser": "^4.0.1",
"@angular/platform-browser-dynamic": "^4.0.1",
"@angular/platform-server": "^4.0.1",
"@angular/router": "^4.0.1",
"@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.22",
"angular2-toaster": "^3.0.1",
"core-js": "^2.4.1",
"ng2-webstorage": "^1.5.1",
"rxjs": "^5.1.0",
"rxjs-es": "^5.0.0-beta.12",
"typescript": "^2.2.2",
"ui-router-ng2": "^1.0.0-beta.4",
"zone.js": "^0.7.6"
},
"devDependencies": {
"@types/jasmine": "2.5.38",
"@types/node": "~6.0.60",
"codelyzer": "~2.0.0",
"jasmine-core": "~2.5.2",
"jasmine-spec-reporter": "~3.2.0",
"karma": "~1.4.1",
"karma-chrome-launcher": "~2.0.0",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^0.2.0",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"node-sass": "^4.5.0",
"protractor": "~5.1.0",
"raw-loader": "^0.5.1",
"sass-loader": "^6.0.3",
"ts-node": "~2.0.0",
"tslint": "~4.4.2"
}
}
更新： 我先前删除了angular2-toaster，但是为了确保不只是toaster模块引起了相同的错误，我又将其添加回来。结果发现，angular2-toaster和ng-bootstrap都引发了相同的错误。
更新2： 当我使用ng server运行服务器时，它可以正常工作，使用angular 4+与ng-bootstrap和angular2-toaster没有问题。
有什么建议吗？提前感谢。