The default value is not appearing in the Select Box when using [(ngModel)] in Angular 2

I have encountered an issue with the code snippet below. When I use variable binding "[(ngModel)]", the default option "Title*" is not visible. However, if I remove it, the first option is shown as selected by default.

 <select name="title" id="title"title="Please select title" [(ngModel)]="title">
                <option value="title" selected>Title*</option>
                <option value="MD">MD</option>
                <option value="RN">RN</option>
                <option value="Mr">Mr</option>
                <option value="Ms">Ms</option>
  </select>
angulartypescriptangular4-forms

Answer №1

Ensure that the title property in your component's class is set to the desired pre-selected element from the titles list. For example:

HTML

<h1>Selection</h1>
<select type="number" [(ngModel)]="title" >
  <option *ngFor="let titl of titles" [ngValue]="titl.name">{{titl.name}}</option>
</select>
{{title}}

Component

export class AppComponent  {
  title:string;
  titles:Array<Object> = [
      {name: "Title*"},
      {name: "MD"},
      {name: "RN"},
      {name: "Mr"},
      {name: "Ms"}
  ];
constructor() {
    //Old Code
   // this.title = this.titles[0]name;

  //New Code
  this.title = this.titles[0]['name'];
  }

}

Demo

Answer №2

There's no need to specify the selected attribute.

Angular takes care of everything for you. All you need to know is that the option with the same value as the bound primitive in the component will be automatically selected thanks to data binding.

For example, if you have a

<select [(ngModel)]="bar" ...

and in the component's TypeScript file, the property bar is set to null, then adding an option like

<option [ngValue]="null" ...

will make it the default selection. To enhance this behavior, you can also include disabled="disabled" to make it function as a placeholder.

Answer №3

Give this a try.

Specify the condition under which the value

" Title" is expected to be selected

 <select name="title" id="title" #title="ngModel" title="Please select title" [(ngModel)]="title">
            <option [selected]="your condition" [value]="title">Title*</option>
            <option value="MD">MD</option>
            <option value="RN">RN</option>
            <option value="Mr">Mr</option>
            <option value="Ms">Ms</option>
 </select>


or you can also test out the following code

 <select name="title" id="title" #title="ngModel" title="Please select title" [(ngModel)]="title">
        <option [selected]="true" [ngValue]="title">Title*</option>
        <option value="MD">MD</option>
        <option value="RN">RN</option>
        <option value="Mr">Mr</option>
        <option value="Ms">Ms</option>
</select>

Answer №4

When working with the latest version of Angular, follow this guide:

//template

 <form [formGroup]="testForm">
    <select formControlName="testControl">
       <option **[ngValue]="null" disabled**>Please select an option</option>
       <option *ngFor="let choice of options" [ngValue]="choice.title">
       {{ choice.title}}
       </option>
    </select>
</form>

//component

options = [{ id: 1, title: 'title 1' }, { id: 2, title: 'title 2' }];
testForm = new FormGroup({
   testControl: new FormControl(null, Validators.required)
});

Answer №5

 <select id="title" title="Please select title" [(ngModel)]="title">
        <option [selected]="true" >Title*</option>
        <option value="MD">MD</option>
        <option value="RN">RN</option>
        <option value="Mr">Mr</option>
        <option value="Ms">Ms</option>
</select>

By simply adding the attribute [selected]="true", it worked perfectly.

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