--prod Build发出警告，升级到Angular 7后部署的应用程序未加载

我最近将现有的Angular 6应用升级到Angular 7。我的大部分应用程序都是基于Angular 6构建的，然后我升级了它

这是我的package.json：

{
  "name": "app-name",
  "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": {
    "@agm/core": "^1.0.0-beta.5",
    "@angular/animations": "^7.0.0",
    "@angular/cdk": "^7.0.0",
    "@angular/common": "^7.0.0",
    "@angular/compiler": "^7.0.0",
    "@angular/core": "^7.0.0",
    "@angular/fire": "^5.0.2",
    "@angular/forms": "^7.0.0",
    "@angular/http": "^7.0.0",
    "@angular/material": "^7.0.0",
    "@angular/platform-browser": "^7.0.0",
    "@angular/platform-browser-dynamic": "^7.0.0",
    "@angular/router": "^7.0.0",
    "bootstrap": "^4.1.3",
    "core-js": "^2.5.4",
    "firebase": "^5.5.1",
    "npm": "^6.4.1",
    "rxjs": "^6.3.3",
    "sweetalert2": "^7.28.7",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.6.8",
    "@angular/cli": "~7.0.2",
    "@angular/compiler-cli": "^7.0.0",
    "@angular/language-service": "^7.0.0",
    "@types/googlemaps": "^3.30.13",
    "@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": "~2.0.0",
    "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"
  }
}

下面是我在运行

ng build--prod

时收到的警告：

C:\Development\Angular\MyApp>ng build --prod
Date: 2018-10-24T17:36:28.367Z
Hash: a03e526b7e8175b25c06
Time: 32695ms
chunk {0} 0.cafd68819f30185de9af.js () 74.8 kB  [rendered]
chunk {1} 1.00224f689303f6e8aae8.js () 33.7 kB  [rendered]
chunk {2} 2.c9d485747518d5177cf8.js () 29.7 kB  [rendered]
chunk {3} 3.e25546a8136eb13e9af3.js () 31.5 kB  [rendered]
chunk {4} 4.120580aa06e187956a3a.js () 51.3 kB  [rendered]
chunk {5} 5.890208a2f9c910b04821.js () 62.8 kB  [rendered]
chunk {6} 6.659eb84df5c798c5ff39.js () 29.4 kB  [rendered]
chunk {7} runtime.4ee86023cc00ae14666e.js (runtime) 1.99 kB [entry] [rendered]
chunk {8} styles.f6067b501f9d2a5208bf.css (styles) 215 kB [initial] [rendered]
chunk {9} polyfills.644a401562606166b860.js (polyfills) 59.6 kB [initial] [rendered]chunk {10} main.be4cab576441165d61f9.js (main) 1.13 MB [initial] [rendered]
WARNING in ./src/app/tv/components/add-program-card/add-program-card.component.ngfactory.js
31:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/tv/components/edit-program-card/edit-program-card.component.ngfactory.js
31:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/news/components/edit-article-card/edit-article-card.component.ngfactory.js
33:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/news/components/add-news-card/add-news-card.component.ngfactory.js
33:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/team/components/add-player-card/add-player-card.component.ngfactory.js
33:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/team/components/edit-player-card/edit-player-card.component.ngfactory.js
33:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/boutique/components/add-merchandise-card/add-merchandise-card.component.ngfactory.js
39:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i6') was not found in '@angular/forms'

WARNING in ./src/app/boutique/components/edit-merchandise-card/edit-merchandise-card.component.ngfactory.js
39:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i6') was not found in '@angular/forms'

WARNING in ./src/app/games/components/edit-game-card/edit-game-card.component.ngfactory.js
45:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/games/components/add-game-card/add-game-card.component.ngfactory.js
45:52-87 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i2') was not found in '@angular/forms'

WARNING in ./src/app/components/login/login.component.ngfactory.js
49:53-88 "export 'ɵangular_packages_forms_forms_bh' (imported as 'i5') was not found in '@angular/forms'

一开始我对这些警告没有太多考虑。但当我尝试导航到Firebase Hosting上托管的应用程序时，我的应用程序未加载，并且在控制台上也出现以下错误：

Uncaught TypeError: e is not a constructor
    at main.be4cab576441165d61f9.js:1
    at Xr (main.be4cab576441165d61f9.js:1)
    at main.be4cab576441165d61f9.js:1
    at new t (main.be4cab576441165d61f9.js:1)
    at Object.mi [as createNgModuleRef] (main.be4cab576441165d61f9.js:1)
    at e.create (main.be4cab576441165d61f9.js:1)
    at main.be4cab576441165d61f9.js:1
    at e.invoke (polyfills.644a401562606166b860.js:1)
    at Object.onInvoke (main.be4cab576441165d61f9.js:1)
    at e.invoke (polyfills.644a401562606166b860.js:1)

到目前为止我尝试过的事情：

搜索

角形文件包\u表单\u表单\u bh

，发现该文件在中引用，并在大约20分钟前更新，但不知道该如何处理

在这个中发现了类似的问题，它指向，但看起来与我的错误无关。它建议我需要导出从

src/index.ts

到现在还没有的所有内容

有人能告诉我如何纠正这个错误吗

更新 我在我的

SharedModule

中创建了一个自定义表单控件元素，它实现了

ControlValueAccessor

。以下是相同的模板：

import { Component, EventEmitter, forwardRef, HostBinding, Input, OnInit, Output } from '@angular/core';
import { FormControl } from '@angular/forms';
import { Observable } from 'rxjs';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
import { map, startWith } from 'rxjs/operators';

@Component({
  selector: 'app-category-list',
  templateUrl: './category-list.component.html',
  styleUrls: ['./category-list.component.scss'],
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => CategoryListComponent),
      multi: true
    }
  ]
})
export class CategoryListComponent implements OnInit, ControlValueAccessor {

  myControl = new FormControl();
  selectedValue;
  filteredOptions: Observable<string[]>;
  question = 'Would you like to add ';
  @Input() options: string[];
  @Output() added = new EventEmitter();

  // Function to call when the option changes.
  onChange(option: string) {

  }

  // Function to call when the input is touched (when the autocomplete is clicked).
  onTouched() {

  }

  get value() {
    return this.selectedValue;
  }

  ngOnInit() {
    this.filteredOptions = this.myControl.valueChanges
      .pipe(
        startWith(''),
        map(option => option ? this.filter(option) : this.options.slice())
      );
  }

  optionSelected(option) {
    if (option.value.indexOf(this.question) === 0) {
      const newOption = option.value.substring(this.question.length).split('?')[0];
      this.options.push(newOption);
      this.added.emit(newOption);
      this.myControl.setValue(newOption);
      this.writeValue(newOption);
    } else {
      this.myControl.setValue(option.value);
      this.writeValue(option.value);
    }
  }

  enter() {
    const controlValue = this.myControl.value;
    if (!this.options.some(entry => entry === controlValue)) {
      this.added.emit(controlValue);
      const index = this.options.push(controlValue);
      setTimeout(
        () => {
          this.myControl.setValue(controlValue);
          this.writeValue(controlValue);
        }
      );
    } else {
      this.writeValue(controlValue);
    }
  }

  // Allows Angular to update the model (option).
  // Update the model and changes needed for the view here.
  writeValue(option: string): void {
    console.log(`writeValue called with ${option}`);
    this.selectedValue = option;
    this.myControl.setValue(option);
    this.onChange(option);
  }

  // Allows Angular to register a function to call when the model (rating) changes.
  // Save the function as a property to call later here.
  registerOnChange(fn: (option: string) => void): void {
    this.onChange = fn;
  }

  // Allows Angular to register a function to call when the input has been touched.
  // Save the function as a property to call later here.
  registerOnTouched(fn: () => void): void {
    this.onTouched = fn;
  }

  private filter(value: string): string[] {
    let results;
    if (value) {
      results = this.options
        .filter(option => option.toLowerCase().indexOf(value.toLowerCase()) === 0);
      if (results.length < 1) {
        results = [this.question + value + '?'];
      }
    } else {
      results = this.options.slice();
    }
    return results;
  }

}

从'@angular/core'导入{Component，EventEmitter，forwardRef，HostBinding，Input，OnInit，Output}；
从'@angular/forms'导入{FormControl}；
从“rxjs”导入{Observable}；
从'@angular/forms'导入{ControlValueAccessor，NG_VALUE_ACCESSOR}；
从“rxjs/operators”导入{map，startWith}；
@组成部分({
选择器：“应用程序类别列表”，
templateUrl:'./category list.component.html'，
样式URL:['./类别列表.component.scss']，
供应商：[
{
提供：NG_值访问器，
useExisting:forwardRef（（）=>CategoryListComponent），
多：真的
}
]
})
导出类CategoryListComponent实现OnInit、ControlValueAccessor{
myControl=newformcontrol（）；
选择值；
过滤装置：可观察；
问题='您想添加'吗；
@输入（）选项：字符串[]；
@添加的输出（）=新的EventEmitter（）；
//当选项更改时调用的函数。
onChange（选项：字符串）{
}
//触摸输入时（单击自动完成时）调用的函数。
未触及的（）{
}
获取值（）{
返回此.selectedValue；
}
恩戈尼尼特（）{
this.filteredOptions=this.myControl.valueChanges
.烟斗(
startWith（“”），
映射（option=>option？this.filter（option）：this.options.slice（）
);
}
选项已选（选项）{
if（option.value.indexOf（this.question）==0）{
const newOption=option.value.substring（this.question.length）.split（“？”）[0]；
this.options.push（newOption）；
this.added.emit（newOption）；
this.myControl.setValue（newOption）；
此.writeValue（新选项）；
}否则{
this.myControl.setValue（option.value）；
this.writeValue（option.value）；
}
}
输入（）{
const controlValue=this.myControl.value；
如果（！this.options.some（entry=>entry==controlValue））{
this.added.emit（controlValue）；
const index=this.options.push（控制值）；
设置超时(
() => {
this.myControl.setValue（controlValue）；
this.writeValue（controlValue）；
}
);
}否则{
this.writeValue（controlValue）；
}
}
//允许Angular更新模型（选项）。
//在此更新视图所需的模型和更改。
writeValue（选项：字符串）：无效{
log（`writeValue调用时使用${option}`）；
this.selectedValue=选项；
this.myControl.setValue（选项）；
此.onChange（选项）；
}
//允许Angular在模型（额定值）更改时注册要调用的函数。
//将函数另存为属性，以便稍后在此调用。
registerOnChange（fn:（选项：字符串）=>void:void{
this.onChange=fn；
}
//允许Angular在触摸输入时注册要调用的函数。
//将函数另存为属性，以便稍后在此调用。
注册表项（fn:（）=>void）：void{
this.ontoched=fn；
}
专用筛选器（值：字符串）：字符串[]{
让结果；
如果（值）{
结果=此选项
.filter（option=>option.toLowerCase（）.indexOf（value.toLowerCase（））==0）；
如果（结果长度<1）{
结果=[this.question+value+'？']；
}
}否则{
结果=this.options.slice（）；
}
返回结果；
}
}

---

这些警告与此有关吗？

从Angular 6升级到Angular 7后，我收到了相同的警告和错误。 我已删除了我的节点\u模块文件夹，然后再次npm安装。

---

现在编译成功了，没有任何警告，我不再有错误“UncaughtTypeError:e不是构造函数”。

这里的正确方向是一步一步地剪切不相关的代码，以提供最小的reproduction@yurzui，我不太明白你的意思。顺便说一句，我已经更新了我的问题。你能检查一下这是否是这些警告的原因，从而导致了问题吗？@yurzui建议创建一个——或者更确切地说，在仍然出现错误的情况下尽可能多地删除代码。也可以做相反的事情：删除代码片段，直到错误不再出现。无论哪种方式，这都会显示导致问题的应用程序部分。这将使确定问题所在变得更容易。我早该这样做的。无论如何非常感谢您的帮助：）