如何检查输入是否在html代码中被修改,而不使用任何形式
我有下面的代码
<textarea #txt (change)="data.url = txt.value" placeholder="https://"
[value]="data.url" ></textarea>
<span *ngIf="!txt.value">
<span class="">Required</span>
</span>
<span *ngIf="txt && txt.dirty && !customValidationService.urlValidator(txt.value)">
<span class="">Invalid</span>
</span>
请帮助,谢谢
<textarea #txt (change)="textChange(event)" = txt.value" placeholder="https://"
[value]="data.url" ></textarea>
<span *ngIf="!txt.value">
<span class="">Required</span>
</span>
<span *ngIf="txt && txt.dirty && !customValidationService.urlValidator(txt.value)">
<span class="">Invalid</span>
</span>
function textChange(event){
/* Validation code here */
}