How to make default checkbox checked in angular 6?

问题

lanuage.component.html

<form method="post" enctype="multipart/form-data">
   <mat-checkbox class="versionstyle" name="languageenabled"[(ngModel)]="languageObj.languageenabled">Enabled</mat-checkbox>
</form>

I want to make checkbox is checked by default in angular6 , i search in google and apply so many solution but it does not work.

回答1:

<mat-checkbox class="example-margin" [(ngModel)]="myModel"/>

OR

<mat-checkbox [checked]="myModel" class="example-margin"/>

Supposed that myModel = true; in component.ts

In your case, try to init this.languageObj.languageenabled = true in component.ts

回答2:

mat-checkbox exposes one @Input() checked: Boolean property. You can do this in your code:

[checked]="languageObj.languageenabled"

来源：https://stackoverflow.com/questions/52094619/how-to-make-default-checkbox-checked-in-angular-6