Question

我已经完成了很多关于导入http的阅读，它只会让我更加困惑，所以我决定关注docs。但我收到错误＆＃34; to-do.component.ts（4,10）模块没有导出的成员＆＃39; HttpClient＆＃34;，当我查找它时，我没有找到相关信息，所以我被卡住了。

app.module.ts：

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

import { AppComponent } from './app.component';
import { GoogleComponent } from './google/google.component';
import { DateTimeComponent } from './date-time/date-time.component';
import { ToDoComponent } from './to-do/to-do.component';

@NgModule({
  declarations: [
    AppComponent,
    GoogleComponent,
    DateTimeComponent,
    ToDoComponent,
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    FormsModule,
    ReactiveFormsModule,
    BrowserAnimationsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})

成分：

//shortened to just imports and the constructor  
import { Component, OnInit } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { trigger,state,style,transition,animate,keyframes } from '@angular/animations';
import { HttpClient } from '@angular/common/http'

  constructor(private http: HttpClient) {    

  }
//...

它必须是简单而明显的东西，但它可能是什么？

Answer 1

你问题是要么你以某种方式丢失了http的npm包，这意味着只需要安装npm

或

你正在使用npm包为angular 2 http，它不在@ angular / common / http中，就像在角度4.3+中一样，这意味着在package.json中更新它

对Angular4 http输入的困惑

1 个答案: