[英]error TS2304: Cannot find name 'HeatmapOverlay' + angular 10
[英]ERROR in src/app/app.module.ts(15,15): error TS2304: Cannot find name 'ServiceName'
我刚接触过角度并尝试逐步学习每一个步骤,我有一项服务,需要在Component中使用它,但遇到上述错误。
ng new appName
ng gc comp-name
创建了一个组件 ng gs service-name
创建了服务 当我在Providers中的app.module.ts
添加服务名称时:['service-name']。 使用ng build || ng serve
代码后出现以下错误 ng build || ng serve
Hash: 31c1abeb694df29adcbe
时间:8299毫秒块{es2015-polyfills} es2015-polyfills.js,es2015-polyfills.js.map(es2015-polyfills)284 kB [初始] [渲染]块{main} main.js,main.js.map(main )637字节[初始] [渲染]块{polyfills} polyfills.js,polyfills.js.map(polyfills)93.1 kB [初始] [渲染]块{runtime} runtime.js,runtime.js.map(运行时)6.08 kB [entry] [rendered]块{styles} styles.js,styles.js.map(样式)16.3 kB [initial] [rendered]
src / app / app.module.ts(15,15)中的错误:错误TS2304:找不到名称“ ServiceOneService”。
组件类别:
import { Component, OnInit } from '@angular/core';
import {ServiceOneService} from "../service-one.service";
@Component({
selector: 'comp-one',
templateUrl: './comp-one.component.html',
styleUrls: ['./comp-one.component.css']
})
export class CompOneComponent implements OnInit {
list;
constructor(service: ServiceOneService) {
this.list = service.getList();
}
ngOnInit() {
}
}
服务等级
import { Injectable } from '@angular/core';
@Injectable({
providedIn: 'root'
})
export class ServiceOneService {
getList() {
return ["List Item 1","List Item 2","List Item 3","List Item 4"];
}
}
app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { CompOneComponent } from './comp-one/comp-one.component';
@NgModule({
declarations: [
AppComponent,
CompOneComponent
],
imports: [
BrowserModule
],
providers: [ServiceOneService], `// getting error here.`
bootstrap: [AppComponent]
})
export class AppModule { }
我已经在我的机器上安装了这些。
Npm : 6.1.0
Node : v8.9.4
Angular Version : "@angular/core": "~7.2.0",
Typescript : Version 3.1.1
有人可以在这里帮助我,将组件导入或添加服务时出了什么问题。
您需要在app.module.ts中导入ServiceOneService
import {ServiceOneService} from "../service-one.service";
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