I have an input field in my twig block. Now when I check to see if the event is cancelable, it returns false.

Is there any way to make it come true? I've tried the 'change' event, but it's also false.

this._dataField.addEventListener('input', ()=> {
    console.log('input');
    this._onChange();
}

_onChange(event) {
    console.log('onChange called');
    var x = event.cancelable;
    console.log(x);
}