@chatterton/angular2-schema-form/src/schema-form/defaultwidgets/checkbox/checkbox.widget.html

Angular2 Schema Form (DISCLAIMER: it is not related to angular-schema-form)

<div class="widget form-group">
    <label [attr.for]="id" class="horizontal control-label">
        {{ schema.title }}
    </label>

	<div class="checkbox">
		<label class="horizontal control-label">
			<input [attr.required]="schema.required" [formControl]="control" [attr.name]="name" [indeterminate]="control.value !== false && control.value !== true ? true :null" type="checkbox" [attr.disabled]="schema.readOnly">
			<input *ngIf="schema.readOnly" [attr.name]="name" type="hidden" [formControl]="control">
			{{schema.description}}
		</label>
	</div>

    <span *ngIf="schema.help" class="formHelp">{{schema.help}}</span>
</div>