componentes angulares, plantillas de componentes

Creación de componentes angulares

Creación de un componente

   ng g component components/header

Utilización de componentes

	<app-header></app-header>

propiedades de unión angular

	<div[id]="id"[title]="msg">调试工具看看我的属性</div>

la circulación de datos * ngFor

	<li *ngFor="let item of list">{{item}}</li>
	<li *ngFor="let item of list;let i = index;"> {{item}} --{{i}} </li>

Condicional * ngIf

	<p *ngIf="list.length > 3">这是 ngIF 判断是否显示</p>
    <p template="ngIf list.length > 3">这是 ngIF 判断是撒否显示</p>

evento de ejecución (clic) = "getData ()"

	<button class="button" (click)="getData()"> 点击按钮触发事件 </button> 
	<button class="button" (click)="setData()"> 点击按钮设置数据 </button>
	getData(){
	 /*自定义方法获取数据*/ 
	  alert(this.msg);
    }
    setData(){ //设置值 this.msg='这是设置的值'; }

eventos de formulario

	<input type="text" (keyup)="keyUpFn($event)"/>
	keyUpFn(e){ console.log(e) }

De dos vías de enlace de datos

<!-- input双向数据绑定 -->
<li>
   <span>姓名：</span> <input type="text" [(ngModel)]="peopleInfo.username" >
</li>

<!-- radio双向数据绑定 -->
<li>
   <span><input type="radio" id="sex1" value="1" [(ngModel)]="peopleInfo.sex"> <label for="sex1">男</label></span>
   <span><input type="radio" id="sex2" value="2" [(ngModel)]="peopleInfo.sex"> <label for="sex2">女</label></span>
</li>

<!-- select双向数据绑定 -->
<li>
   <select name="" id="" [(ngModel)]="peopleInfo.city">
      <option [value]="item" *ngFor="let item of peopleInfo.citylist">{{item}}</option>
   </select>
</li>

<!-- checkbox双向绑定 -->
<li>
    <span *ngFor="let item of peopleInfo.hobby; let key=index">
        <input type="checkbox" [id]="'checked'+'key'" [(ngModel)]="item.checked" > <label [for]="'checked'+'key'">{{item.title}}</label>&nbsp;&nbsp;
    </span>
</li>
<li>
    <button (click)="submitValue()">获取表单事件</button>
</li>

<!-- textarea双向绑定 -->
<li>
    <textarea name="" id="" cols="30" rows="10" [(ngModel)]="peopleInfo.mark"></textarea>
</li>

<pre>
    {{peopleInfo| json}}
</pre>

public peopleInfo: any = {
  username: ''
};
// 可以直接获取双向绑定的值
submitValue() {
  console.log(this.peopleInfo.username);
}


export class FromComponent implements OnInit {
  public peopleInfo: any = {
    username: '',
    sex: '1',
    citylist: ['北京', '上海', '深圳'],
    city: '北京',
    hobby: [{
      title: '吃饭',
      checked: false
    }, {
      title: '睡觉',
      checked: false
    }, {
      title: '敲代码',
      checked: true
    }],
    mark: ''
  };
  constructor() {
  }
  ngOnInit() {
  }
  submitValue() {
    console.log(this.peopleInfo);
  }
}

[NgClass], [ngStyle]

	<div [ngClass]="{'red': true, 'blue': false}"> 这是一个 div </div>
	public flag=false; 
	<div [ngClass]="{'red': flag, 'blue': !flag}"> 这是一个 div </div>
	public arr = [1, 3, 4, 5, 6]; 
	<ul>
		<li *ngFor="let item of arr, let i = index"> <span [ngClass]="{'red': i==0}">{{item}}</span> </li>
    </ul>
    <div [ngStyle]="{'background-color':'green'}">你好 ngStyle</div> 
    public attr='red';
    <div [ngStyle]="{'background-color':attr}">你好 ngStyle</div>

oleoducto

	public today=new Date(); 
	<p>{{today | date:'yyyy-MM-dd HH:mm:ss' }}</p>