Angular 2: Can't bind to x since it isn't a known native property [duplicate]

In general, the can't bind to xxx since it isn't a known native property error occurs when you have a typo in your HTML when trying to use an attribute directive, or when trying to setup a property binding.

Common examples are when you miss a * or a # or let or use in instead of of with the Angular built-in structural directives:

<div  ngIf="..."                 // should be *ngIf
<div  ngFor="..."                // should be *ngFor="..."
<div *ngFor="let item in items"  // should be "let item of items"
<div *ngFor="item of items"      // should be "let item of items"

A misspelling or wrong case will also generate the problem::

<div *ngFer="..."
<div *NgFor="..."

Another reason is if you specify a property that doesn't exist on the DOM element or component:

<div [prop1]="..."       // prop1 isn't a valid DOM property for a div
<my-comp [answr]="..."   // typo, should be [answer]

For typos with the built-in Angular directives, since the typo doesn't match any of the built-in directive selectors, Angular tries to setup a binding to a property of the DOM element (the div in the above examples) with the typo name. This fails because a div does not have a native ngIf or ngFer or prop1 DOM property.

--

For attributes (not properties) you need to use attribute binding, for example for height attribute of svg: <svg [attr.height]="myHeightProp">

try using [(ngModel)] rather than *NgModel and *ngIf instead of *NgIf

<span>{{nickname}}</span>&nbsp;&nbsp; <button type="button" (click)="signOut()">|→ Sign out</button>

export class AuthBoxComponent {
    nickname="guest";
    ...
}