angular封装进度条组件（如何用DevUI搭建自己的Angular组件库）

ng new <my-project>

ng generate library <my-lib> --prefix <my-prefix>

"my-lib": {
  "projectType": "library",
  "root": "projects/my-lib",
  "sourceRoot": "projects/my-lib/src",
  "prefix": "dev",
  "architect": {
    "build": {
      "builder": "@angular-devkit/build-ng-packagr:build",
      "options": {
          "tsConfig": "projects/my-lib/tsconfig.lib.json",
          "project": "projects/my-lib/ng-package.json"
      },
  "configurations": {
    "production": {
      "tsConfig": "projects/my-lib/tsconfig.lib.prod.json"
    }
  }
},
...

// my-lib.module.ts


import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { AlertModule } from 'my-lib/alert'; // 此处按照按需引入方式导入，my-lib对应我们的发布库名


@NgModule({
  imports: [ CommonModule ],
  exports: [AlertModule],
  providers: [],
})
export class MyLibModule {}


// index.ts
export * from './my-lib.module';


//angular.json
"projectType": "library",
"root": "projects/my-lib",
"sourceRoot": "projects/my-lib", // 这里路径指向我们新的目录
"prefix": "devui"

{
  "$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
  "dest": "../../publish",
  "lib": {
    "entryFile": "./index.ts"
  },
  "whitelistedNonPeerDependencies": ["lodash-es"]
}

{
  "name": "my-lib",
  "version": "0.0.1",
  "peerDependencies": {
    "@angular/common": "^9.1.6",
    "@angular/core": "^9.1.6",
    "tslib": "^1.10.0"
  }
}

// package.json
{
  "ngPackage": {
    "lib": {
      "entryFile": "public-api.ts"
    }
  }
}


//public-api.ts
/*
* Public API Surface of Alert
*/
export * from './alert.component';
export * from './alert.module';

import { Component, Input } from '@angular/core';
// 定义alert有哪些可选类型
export type AlertType = 'success' | 'danger' | 'warning' | 'info';


@Component({
  selector: 'dev-alert',
  templateUrl: './alert.component.html',
  styleUrls: ['./alert.component.scss'],
})
export class AlertComponent {
  // Alert 类型
  @Input() type: AlertType = 'info';
  // 是否显示图标，用于支持用户自定义图标
  @Input() showIcon = true;
  // 是否可关闭
  @Input() closeable = false;
  // 关闭回调
  @Output() closeEvent: EventEmitter<boolean> = new EventEmitter<boolean>();
  hide = false;
  constructor() {}


  close(){
    this.closeEvent.emit(true);
    this.hide = true;
  }
}

<li class="dev-alert {{ type }} " *.jpg" alt="angular封装进度条组件（如何用DevUI搭建自己的Angular组件库）" border="0" />

"paths": {
  "my-lib": [
    "projects/my-lib/index.ts"
  ],
  "my-lib/*": [
    "projects/my-lib/*"
  ],
}

import { AlertModule } from 'my-lib/alert';
// import { MyLibModule } from 'my-lib';


@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    // MyLibModule
    AlertModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

<section>
  <dev-alert>我是一个默认类型的alert</dev-alert>
</section>

// angular.json
"my-lib": {
  ...
  "test": {
    "builder": "@angular-devkit/build-angular:karma",
    "options": {
      "main": "projects/my-lib/test.ts", // 这里指向调整后的文件路径
      "tsConfig": "projects/my-lib/tsconfig.spec.json",
      "karmaConfig": "projects/my-lib/karma.conf.js"
    }
  },
}


//my-lib 目录下的tsconfig.spec.json  


"files": [
  "test.ts" // 指向当前目录下的测试入口文件
]

import { async, ComponentFixture, TestBed } from '@angular/core/testing';


import { Component } from '@angular/core';
import { AlertModule } from './alert.module';
import { AlertComponent } from './alert.component';
import { By } from '@angular/platform-browser';


@Component({
  template: `
    <dev-alert [type]="type" [showIcon]= "showIcon"[closeable]="closeable"    (closeEvent)="handleClose($event)">
    <span>我是一个Alert组件</span>
    </dev-alert>
  `
})
class TestAlertComponent {
  type = 'info';
  showIcon = false;
  closeable = false;
  clickCount = 0;
  handleClose(value) {
    this.clickCount++;
  }
}


describe('AlertComponent', () => {
  let component: TestAlertComponent;
  let fixture: ComponentFixture<TestAlertComponent>;
  let alertElement: HTMLElement;


  beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [AlertModule],
      declarations: [ TestAlertComponent ]
    })
    .compileComponents();
  }));


  beforeEach(() => {
    fixture = TestBed.createComponent(TestAlertComponent);
    component = fixture.componentInstance;
    alertElement = fixture.debugElement.query(By.directive(AlertComponent)).nativeElement;
    fixture.detectChanges();
  });


  describe('alert instance test', () => {
    it('should create', () => {
      expect(component).toBeTruthy();
    });
  });


  describe('alert type test', () => {
    it('Alert should has info type', () => {
      expect(alertElement.querySelector('.info')).not.toBe(null);
    });


    it('Alert should has success type', () => {
      // 修改type，判断类型改变是否正确
      component.type = 'success';
      fixture.detectChanges();
      expect(alertElement.querySelector('.success')).not.toBe(null);
    });
  }

ng build my-lib --prod