[英]Cannot read properties of undefined (reading 'getAttribute') mat-checkbox
I'm trying to use some Angular Material Components such as mat-checkbox, but when I set a custom attribute, I get我正在尝试使用一些 Angular 材质组件,例如 mat-checkbox,但是当我设置自定义属性时,我得到
Cannot read properties of undefined (reading 'getAttribute')
无法读取未定义的属性(读取“getAttribute”)
The code used is as it goes:使用的代码是这样的:
<li *ngFor="let instancia of tipo_maquina.instancias">
<mat-checkbox
(change)="onCheckChange($event, $event.source, $event.checked)"
[attr.typeid]="instancia.id">
{{instancia.nombre}}
</mat-checkbox>
</li>
onCheckChange(event: any, checkbox: MatCheckbox, isChecked: boolean){
console.log("check event")
console.log(event.target.getAttribute('typeid'));
}
The type of $event
should be MatCheckboxChange
and it has 2 properties $event
的类型应该是MatCheckboxChange
并且它有 2 个属性
/** Change event object emitted by MatCheckbox. */
export declare class MatCheckboxChange
{
/** The source MatCheckbox of the event. */
source: MatCheckbox;
/** The new `checked` value of the checkbox. */
checked: boolean;
}
So target does not exist on MatCheckboxChange
and you would get an error error TS2339: Property target' does not exist on type 'MatCheckboxChange' .所以目标在
MatCheckboxChange
上不存在,你会得到一个错误error TS2339: Property target' doesn't exist on type 'MatCheckboxChange' 。
As @MikeOne suggested, just pass instancia.id
to the onCheckChange($event, instancia.id)
method.正如@MikeOne 建议的那样,只需将
instancia.id
传递给onCheckChange($event, instancia.id)
方法。
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