angular - 更新 Angular 8.0 后，模块没有导出的成员组件

Question

错误

ERROR in src/app/custom-filterdt/custom-filterdt.component.ts(11,4): error TS2554: Expected 2 arguments, but got 1.

typescript 代码

 import { Component, OnInit, OnDestroy, ViewChild } from '@angular/core';
 import { DataTableDirective } from 'angular-datatables';
  @Component({
    selector: 'app-custom-filterdt',
    templateUrl: './custom-filterdt.component.html',
    styleUrls: ['./custom-filterdt.component.css']
    })

代码错误

import { Component, OnInit, OnDestroy, ViewChild } from '@angular/core';

错误信息

import Component Module '"../../../node_modules/@angular/core/core"' has no exported member 'Component'.ts(230

NG版本

                            Angular CLI: 8.0.3
                            Node: 12.4.0
                            OS: win32 x64
                            Angular: 8.0.1
                            ... animations, cdk, common, compiler, compiler-cli, core, forms
                            ... language-service, material, platform-browser
                            ... platform-browser-dynamic, router, service-worker

                            Package                           Version
                            -----------------------------------------------------------
                            @angular-devkit/architect         0.800.3
                            @angular-devkit/build-angular     0.800.3
                            @angular-devkit/build-optimizer   0.800.3
                            @angular-devkit/build-webpack     0.800.3
                            @angular-devkit/core              8.0.3
                            @angular-devkit/schematics        8.0.3
                            @angular/cli                      8.0.3
                            @angular/http                     7.2.15
                            @angular/pwa                      0.800.3
                            @ngtools/webpack                  8.0.3
                            @schematics/angular               8.0.3
                            @schematics/update                0.800.3 (cli-only)
                            rxjs                              6.5.2
                            typescript                        3.4.5
                            webpack                           4.30.0

• 非常欢迎任何帮助

上述问题通过删除node模块即可解决

但是在这个新错误之后

Expected 2 arguments, but got 1.ts(2554) core.d.ts(8064, 47): An argument for 'opts' was not provided

 viewchild @ViewChild('maincontent') mainContent: any; An argument for 'opts' was not provided.  error TS2554: Expected 2 arguments, but got 1 in v8

typescript

 export class ViewchildexampleComponent implements OnInit {
 @ViewChild('maincontent') mainContent: any;

Answer 1

正如 SiddAjmera 建议删除 node_modules 文件夹并运行 npm install 似乎可以解决该问题。解决了我的列表