角度未捕获类型错误:e不是生成后的构造函数--prod(处理ng-serve)

我上传角度应用程序到产品时遇到问题。 这个应用程序在开发中工作得很好,在投入生产之前也可以使用。

要构建我正在使用的应用程序:

ng build --prod --base-href="/site/" 

已生成应用程序,但出现以下警告:

WARNING in ./src/app/eco-header/eco-header.component.ngfactory.js 138:299-319 "export 'MAT_ICON_LOCATION' (imported as 'i9') was not found in '@angular/material/icon'

WARNING in ./node_modules/@angular/material/dialog/typings/index.ngfactory.js 20:1247-1265 "export 'ScrollingModule' (imported as 'i7') was not found in '@angular/cdk/scrolling'

WARNING in ./node_modules/@angular/material/dialog/typings/index.ngfactory.js 20:1267-1285 "export 'ScrollingModule' (imported as 'i7') was not found in '@angular/cdk/scrolling'

WARNING in ./node_modules/@angular/material/icon/typings/index.ngfactory.js 20:327-347 "export 'MAT_ICON_LOCATION' (imported as 'i1') was not found in '@angular/material/icon'

当我尝试加载页面时,会出现以下错误:

Uncaught TypeError: e is not a constructor
    at main.1ebe20842d3713f62535.js:1
    at Wl (main.1ebe20842d3713f62535.js:1)
    at main.1ebe20842d3713f62535.js:1
    at new t (main.1ebe20842d3713f62535.js:1)
    at Object.dr [as createNgModuleRef] (main.1ebe20842d3713f62535.js:1)
    at e.create (main.1ebe20842d3713f62535.js:1)
    at main.1ebe20842d3713f62535.js:1
    at e.invoke (polyfills.c72d3210425a88b28b6d.js:1)
    at Object.onInvoke (main.1ebe20842d3713f62535.js:1)
    at e.invoke (polyfills.c72d3210425a88b28b6d.js:1)

我的 tsconfig :

{
    "compilerOptions": {
        "experimentalDecorators": true,
        "allowJs": true,
        "sourceMap": true
    }
}

我的 package.json :

{   "name": "idea-ecomanager-frontend",   "version": "0.0.0",   "scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"   },   "private": true,   "dependencies": {
"@angular/animations": "^7.0.1",
"@angular/cdk": "^7.0.2",
"@angular/common": "^7.0.1",
"@angular/compiler": "^7.0.1",
"@angular/core": "^7.0.1",
"@angular/forms": "^7.0.1",
"@angular/http": "^7.0.1",
"@angular/material": "^7.0.2",
"@angular/platform-browser": "^7.0.1",
"@angular/platform-browser-dynamic": "^7.0.1",
"@angular/router": "^7.0.1",
"angularcli": "^6.0.1",
"bootstrap": "^4.1.3",
"core-js": "^2.5.4",
"ngx-loading": "^3.0.1",
"ngx-toastr": "^9.1.1",
"rxjs": "^6.3.3",
"zone.js": "^0.8.26"   },   "devDependencies": {
"@angular-devkit/build-angular": "~0.6.0",
"@angular/cli": "^6.0.8",
"@angular/compiler-cli": "^7.0.1",
"@angular/language-service": "^7.0.1",
"@types/jasmine": "~2.8.6",
"@types/jasminewd2": "~2.0.3",
"@types/node": "~8.9.4",
"codelyzer": "~4.2.1",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~1.7.1",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~1.4.2",
"karma-jasmine": "~1.1.1",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.3.0",
"ts-node": "~5.0.1",
"tslint": "~5.9.1",
"typescript": "~3.1.3"   } }

知道为什么会这样吗?