ngx-bootstrap使用03 Alerts组件、利用Object.assign复制对象

1 Alerts

　　该组件用于给用户操作提供反馈信息或者提供一些警告信息

2 用法

　　2.1 下载ngx-bootstrap依赖

　　　　参考博文：点击前往

　　2.2 在模块级别导入AlertModule模块

　　　　技巧01：由于AlertModule是一个工具组件，在实际开发中一般都是在共享模块进行导入的

　　　　

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { TestComponent } from './test/test.component';
import {FormsModule, ReactiveFormsModule} from '@angular/forms';

import {
  AccordionModule,
  AlertModule
} from 'ngx-bootstrap';

@NgModule({
  declarations: [
    AppComponent,
    TestComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    ReactiveFormsModule,
    AccordionModule.forRoot(),
    AlertModule.forRoot()
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }
View Code

　　2.3 在需要用Alerts组件的地方直接使用alert选择器即可

    <alert type="success">
      hello boy
    </alert>

　　2.4 效果展示

　　　　

 3 实例讲解

　　3.1 基本使用结构

　　　　Alert组件可以包含任意长度的文本内容，还可以包含一个按钮来控制alert组件的隐藏；alert组件通过制定type属性的值来设置样式，type属性的值只能是success、info、warning、danger中的一个

　　　　3.1.1 alert组件样式

　　　　　　可以利用alert-*来给alert组件内的其他元素制定样式，aler-*样式列表如下

　　　　　　　　

　　　　3.1.2 alert组件基本结构

    <alert type="类型名称">
      内容
    </alert>

　　

<div class="panel panel-primary">
  <div class="panel-heading">alerts组件基本结构</div>
  <div class="panel-body">
    <alert type="success">
      <strong>success&nbsp;</strong>
      <span>使用了success样式的alert组件</span>
    </alert>
    <alert type="info">
      <strong>info&nbsp;</strong>
      <span>使用了info样式的alert组件</span>
    </alert>
    <alert type="warning">
      <strong>warning&nbsp;</strong>
      <span>使用了warning样式的alert组件</span>
    </alert>
    <alert type="danger">
      <strong>danger&nbsp;</strong>
      <span>使用了danger样式的alert组件</span>
    </alert>
  </div>
  <div class="panel-footer">2018-1-7 16:53:48</div>
</div>
HTML
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

}
TS

　　3.2 自动匹配颜色

　　　　为alert组件内部的其它元素添加alert-link类去自动根据alert组件的类型进行颜色匹配

　　　　技巧01：如果alert组件内部的元素不指定alert-link类，会自动进行颜色匹配

　　　　技巧02：如果alert组件内部的其他元素制定了alert-link类，不仅会进行颜色自动匹配还会进行加粗设置

 　

<div class="panel panel-primary">
  <div class="panel-heading">alerts组件基本结构</div>
  <div class="panel-body">
    <alert type="success">
      <strong class="alert-link">success&nbsp;</strong>
      <span>使用了success样式的alert组件</span>
      <a class="alert-link" href="https://valor-software.com/ngx-bootstrap/#/alerts">alert组件官方文档</a>
    </alert>
    <alert type="info">
      <strong>info&nbsp;</strong>
      <span>使用了info样式的alert组件</span>
      <a class="alert-link" href="https://valor-software.com/ngx-bootstrap/#/alerts">alert组件官方文档</a>
    </alert>
    <alert type="warning">
      <strong>warning&nbsp;</strong>
      <span>使用了warning样式的alert组件</span>
      <a class="alert-link" href="https://valor-software.com/ngx-bootstrap/#/alerts">alert组件官方文档</a>
    </alert>
    <alert type="danger">
      <strong>danger&nbsp;</strong>
      <span>使用了danger样式的alert组件</span>
      <a class="alert-link" href="https://valor-software.com/ngx-bootstrap/#/alerts">alert组件官方文档</a>
    </alert>
  </div>
  <div class="panel-footer">2018-1-7 16:53:48</div>
</div>
HTML
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

}
TS

　　3.3 包含其它元素

　　　　alert元素可以包含其它的HTML元素

　　　

<div class="panel panel-primary">
  <div class="panel-heading">alert包含其他HTML元素</div>
  <div class="panel-body">
    <alert type="success">
      <h2>包含其它元素</h2>
      <div>我是div元素</div>
    </alert>
  </div>
  <div class="panel-footer">2018-1-7 20:48:28</div>
</div>
HTML
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

}
TS

　　3.4 输入属性dismissible

　　　　当alert组件的dismissible属性值为真时就会出现一个关闭按钮，点击就可以关闭alert组件

　　　　技巧01：在typescript中利用Object.assign实现对象的复制

　　　　　　参考博文：点击前往

　　　

<div class="panel panel-primary">
  <div class="panel-heading">输入属性diamissible</div>
  <div class="panel-body">
    <alert type="success" dismissible="true">
      <span class="alert-link">Dismissible</span>
      <span>当alert组件的dismissible属性值为真时就会出现一个关闭按钮，点击就可以关闭ale rt组件</span>
    </alert>

    <button class="btn-primary" (click)="onDismissible()">dismissible功能切换</button>
    <span *ngIf="dismissible">dismissible功能开启<button class="btn-info" (click)="onReset()">Reset</button></span>
    <span *ngIf="!dismissible">dismissible功能关闭</span>
    <alert *ngFor="let alert of alerts;" [dismissible]="dismissible">
      <span class="alert-link">{{alert.title}}</span>
      <span>{{alert.content}}</span>
    </alert>
  </div>
  <div class="panel-footer">2018-1-7 20:55:33</div>
</div>
HTML
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {
  alerts: Alert[];
  dismissible = false;

  constructor() { }

  ngOnInit() {
    this. alerts = [
      new Alert('标题01', '内容01'),
      new Alert('标题02', '内容02'),
      new Alert('标题03', '内容03')
    ];
  }

  onDismissible() {
    this.dismissible = !this.dismissible;
  }
  onReset() {
    this.alerts = this.alerts.map((alert: Alert) => Object.assign(new Alert('', ''), alert));
  }

}


export class Alert {
  private _title;
  private _content;


  constructor(title, content) {
    this._title = title;
    this._content = content;
  }


  get title() {
    return this._title;
  }

  set title(value) {
    this._title = value;
  }

  get content() {
    return this._content;
  }

  set content(value) {
    this._content = value;
  }
}
TS

　　3.5 在alert组件内动态显示HTML代码

　　　　alert组件内部可以放其它的元素，如果我们想在alert组件内部动态地添加HTML代码，只需要利用ts将HTML代码进行封装即可

　　　　技巧01：在TS中的HTML代码需要利用DomSanitizer服务进行处理

　　　　技巧02：innerHtml和innerText的区别

　　　　　　innerHTML可以识别HTML标签和汉字

　　　　　　innerText会将所有的当成文本处理，而且不能识别汉字

　　　　技巧03：DomSanitizer服务可以实现跨站脚本攻击

　　　　　　参考博文：点击前往

　　　　

<div class="panel panel-primary">
  <div class="panel-heading">在alert组件内部显示HTML代码</div>
  <div class="panel-body">
    <div *ngFor="let alert of alerts;">
      <alert type="success" [type]="alert.type">
        <span [innerHtml]="alert.content"></span>
      </alert>
    </div>
  </div>
  <div class="panel-footer">2018-1-7 22:05:05</div>
</div>
HTML
import { Component, OnInit, SecurityContext } from '@angular/core';
import { DomSanitizer} from '@angular/platform-browser';


@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {
  alerts: Alert[];
  dismissible = false;

  constructor(
    private domSanitizer: DomSanitizer
  ) { }

  ngOnInit() {
    this.alerts = [
      new Alert('success', `<strong>内容01</strong>`),
      new Alert('info', `<i>内容02</i>`),
      new Alert('warning', '内容03')
    ];
    this.alerts = this.alerts.map((alert: Alert) => new Alert(alert.type, this.domSanitizer.sanitize(SecurityContext.HTML, alert.content)))
  }

}


export class Alert {
  private _type;
  private _content;


  constructor(type, content) {
    this._type = type;
    this._content = content;
  }


  get type() {
    return this._type;
  }

  set type(value) {
    this._type = value;
  }

  get content() {
    return this._content;
  }

  set content(value) {
    this._content = value;
  }
}
TS

　　3.6 动态改变alert组件的内容

　　　　通过一个单机按钮来动态改变alert组件的内容，用一个列表来存储alert组件的内容

　　　　技巧01：*ngIf指令的使用

　　　　　　官方文档：点击前往

<div class="panel panel-primary">
  <div class="panel-heading">动态显示alert组件的内容</div>
  <div class="panel-body">
    <button *ngIf="index < messages.length - 1; else elseblock" class="btn-info" (click)="onAdd()">改变alert组件的内容</button>
    <ng-template #elseblock>
      <button class="btn-warning" (click)="index = 0">Reset</button>
    </ng-template>
    <alert>{{messages[index]}}</alert>
  </div>
  <div class="panel-footer">2018-1-7 22:38:03</div>
</div>
HTML
import { Component, OnInit, SecurityContext } from '@angular/core';
import { DomSanitizer} from '@angular/platform-browser';


@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {
  messages: string[];
  index = 0;

  constructor(
  ) { }

  ngOnInit() {
    this.messages = [
      '重庆市大足区',
      '重庆市沙坪坝区',
      '重庆市合川区'
    ];
  }

  onAdd() {
    if (this.index !== this.messages.length - 1) {
      this.index++;
    }
  }

}
View Code

　　3.7 定时消失

　　　　当alert组件的dismissOnTimeout属性的值设置了数值后，该alert组件就会在相应的时间后消失，例如

    <alert type="success" [dismissOnTimeout]="5000">
      <span class="alert-link">Success</span>
      <div>Welcom to the city of Chongqing. <- 5秒钟后我会消失哟</div>
    </alert>

　　　　代码解释：该alert组件会在5秒钟后消失

　　　　技巧01：alert组件的dismissOnTimeout属性值的单位是毫秒

　　　　

<div class="panel panel-primary">
  <div class="panel-heading">alert组件定时消失</div>
  <div class="panel-body">
    <alert type="success" [dismissOnTimeout]="5000">
      <span class="alert-link">Success</span>
      <div>Welcom to the city of Chongqing. <- 5秒钟后我会消失哟</div>
    </alert>
    <alert type="info" *ngFor="let alert of alerts;" [type]="alert?.type" [dismissOnTimeout]="alert?.timeOut">
      {{alert?.message}}
    </alert>
    <button class="btn-primary" (click)="onAdd()">添加alert组件</button>
  </div>
  <div class="panel-footer">2018-1-8 09:48:18</div>
</div>
HTML
import { Component, OnInit, SecurityContext } from '@angular/core';
import { DomSanitizer} from '@angular/platform-browser';


@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {
  alerts: Alert[];
  alert = new Alert('info', '3秒钟后会消失', 3000);
  constructor(
  ) { }

  ngOnInit() {
    this.alerts = [];
  }

  onAdd() {
    this.alerts.push(this.alert);
  }

}

export class Alert {
  private _type: string;
  private _message: string;
  private _timeOut: number;

  constructor(type: string, message: string, timeOut: number) {
    this._type = type;
    this._message = message;
    this._timeOut = timeOut;
  }


  get type(): string {
    return this._type;
  }

  set type(value: string) {
    this._type = value;
  }

  get message(): string {
    return this._message;
  }

  set message(value: string) {
    this._message = value;
  }

  get timeOut(): number {
    return this._timeOut;
  }

  set timeOut(value: number) {
    this._timeOut = value;
  }
}
TS

4 Alert API

　　4.1 alert组件选择器

<alert></alert>

　　4.2 输入属性

　　　　4.2.1 dismissible

　　　　　　类型：Boolean

　　　　　　默认值：false

　　　　　　说明：如果设置了dismissible属性值为true，alert组件就会出现一个关闭按钮，点击他就可以关闭该alert组件

　　　　

<div class="panel panel-primary">
  <div class="panel-heading">alert组件的输入属性dismissible</div>
  <div class="panel-body">
    <alert type="success" dismissible="true">hello boy</alert>
  </div>
  <div class="panel-footer">2018-1-8 11:23:02</div>
</div>
View Code

　　　　4.2.2  dismissOnTimeout

　　　　　　类型：string/number

　　　　　　说明：单位是毫秒，在设定的毫秒后alert组件会自动关闭

<div class="panel panel-primary">
  <div class="panel-heading">alert组件的dismissOnTimeout</div>
  <div class="panel-body">
    <alert type="success" dismissOnTimeout="3000">
      3秒钟后我会消失
    </alert>
  </div>
  <div class="panel-footer">2018-1-8 13:31:05</div>
</div>
View Code

　　　　4.2.3 isOpen

　　　　　　类型：boolean

　　　　　　默认值：true

　　　　　　说明：isOpen属性值为true时alert组件会显示，为false就会消失

　　

<div class="panel panel-primary">
  <div class="panel-heading">alert组件的isOpen属性</div>
  <div class="panel-body">
    <button class="btn-danger" *ngIf="open; else elseblock" (click)="onClose()">关闭</button>
    <ng-template #elseblock>
      <button class="btn-primary" (click)="onOpen()">打开</button>
    </ng-template>
    <alert type="success" [isOpen]="open">
      我出现啦
    </alert>
  </div>
  <div class="panel-footer">2018-1-8 13:31:05</div>
</div>
HTML
import { Component, OnInit, SecurityContext } from '@angular/core';
import { DomSanitizer} from '@angular/platform-browser';


@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {

  open = true;

  constructor(
  ) { }

  ngOnInit() {
  }

  onClose() {
    this.open = false;
  }

  onOpen() {
    this.open = true;
  }

}

export class Alert {
  private _type: string;
  private _message: string;
  private _timeOut: number;

  constructor(type: string, message: string, timeOut: number) {
    this._type = type;
    this._message = message;
    this._timeOut = timeOut;
  }


  get type(): string {
    return this._type;
  }

  set type(value: string) {
    this._type = value;
  }

  get message(): string {
    return this._message;
  }

  set message(value: string) {
    this._message = value;
  }

  get timeOut(): number {
    return this._timeOut;
  }

  set timeOut(value: number) {
    this._timeOut = value;
  }
}
TS

　　　　4.2.4 type

　　　　　　类型：string

　　　　　　默认值：warning

　　　　　　说明：该属性是用来指定的alert组件的样式的，只能是primary,info,warning,danger

　　4.3 输出属性

　　　　4.3.1 onClose

　　　　　　说明：调用相关方法关闭alert组件时触发该事件，此时alert组件的isOpen属性值为true

　　　　　　

<div class="panel panel-primary">
  <div class="panel-heading">alert组件的isOpen属性</div>
  <div class="panel-body">
    <button class="btn-danger" *ngIf="open; else elseblock" (click)="onClose()">关闭</button>
    <ng-template #elseblock>
      <button class="btn-primary" (click)="onOpen()">打开</button>
    </ng-template>
    <alert
      dismissible="true"
      type="success"
      [isOpen]="open"
      (onClosed)="closed($event)"
      (onClose)="close($event)">
      我出现啦
    </alert>
  </div>
  <div class="panel-footer">2018-1-8 13:31:05</div>
</div>
HTML
import { Component, OnInit, SecurityContext } from '@angular/core';
import { DomSanitizer} from '@angular/platform-browser';


@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {

  open = true;

  constructor(
  ) { }

  ngOnInit() {
  }

  onClose() {
    this.open = false;
  }

  onOpen() {
    this.open = true;
  }

  close(event: any) {
    alert('将要执行关闭操作');
    // console.log(JSON.stringify(event));
    console.log(event);
  }

  closed(event: any) {
    alert('关闭操作执行完毕');
    // console.log(JSON.stringify(event));
    console.log(event);
  }

}

export class Alert {
  private _type: string;
  private _message: string;
  private _timeOut: number;

  constructor(type: string, message: string, timeOut: number) {
    this._type = type;
    this._message = message;
    this._timeOut = timeOut;
  }


  get type(): string {
    return this._type;
  }

  set type(value: string) {
    this._type = value;
  }

  get message(): string {
    return this._message;
  }

  set message(value: string) {
    this._message = value;
  }

  get timeOut(): number {
    return this._timeOut;
  }

  set timeOut(value: number) {
    this._timeOut = value;
  }
}
TS

　　　　4.3.2 onClosed

　　　　　　说明：alert组件关闭完成后触发该事件，此时alert组件的isOpen属性为false

<div class="panel panel-primary">
  <div class="panel-heading">alert组件的isOpen属性</div>
  <div class="panel-body">
    <button class="btn-danger" *ngIf="open; else elseblock" (click)="onClose()">关闭</button>
    <ng-template #elseblock>
      <button class="btn-primary" (click)="onOpen()">打开</button>
    </ng-template>
    <alert
      dismissible="true"
      type="success"
      [isOpen]="open"
      (onClosed)="closed($event)"
      (onClose)="close($event)">
      我出现啦
    </alert>
  </div>
  <div class="panel-footer">2018-1-8 13:31:05</div>
</div>
import { Component, OnInit, SecurityContext } from '@angular/core';
import { DomSanitizer} from '@angular/platform-browser';


@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {

  open = true;

  constructor(
  ) { }

  ngOnInit() {
  }

  onClose() {
    this.open = false;
  }

  onOpen() {
    this.open = true;
  }

  close(event: any) {
    alert('将要执行关闭操作');
    // console.log(JSON.stringify(event));
    console.log(event);
  }

  closed(event: any) {
    alert('关闭操作执行完毕');
    // console.log(JSON.stringify(event));
    console.log(event);
  }

}

export class Alert {
  private _type: string;
  private _message: string;
  private _timeOut: number;

  constructor(type: string, message: string, timeOut: number) {
    this._type = type;
    this._message = message;
    this._timeOut = timeOut;
  }


  get type(): string {
    return this._type;
  }

  set type(value: string) {
    this._type = value;
  }

  get message(): string {
    return this._message;
  }

  set message(value: string) {
    this._message = value;
  }

  get timeOut(): number {
    return this._timeOut;
  }

  set timeOut(value: number) {
    this._timeOut = value;
  }
}
TS

 　　4.4 官方文档

　　　　点击前往

　　　　

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原文地址：https://www.cnblogs.com/NeverCtrl-C/p/8232750.html