问题
The docs say
updateOn: string specifying which event should the input be bound to. You can set several events using an space delimited list. There is a special event called default that matches the default events belonging of the control.
The page mentions a few events: blur, default, submit. Are there any others? Is the full list documented anywhere?
回答1:
As far as i know, you can bind any available DOM event to the updateOn property. see a full list here.
Having a look at the Source of ngModel, you can see that the options passed to updateOn will get bound to the actual element itself.
https://github.com/angular/angular.js/blob/master/src/ng/directive/ngModel.js#L1188
Angular Source:
if (modelCtrl.$options.getOption('updateOn')) {
element.on(modelCtrl.$options.getOption('updateOn'), function(ev) {
modelCtrl.$$debounceViewValueCommit(ev && ev.type);
});
}
回答2:
You can now control for a form (or single form elements) when the value or the validity is updated. This feature has been available in AngularJS 1.x but missed in Angular 2+ so far. The following update options can now be used in Angular 5 forms:
change: change is the default mode. By using this update option the form / form control is updated after every single change.
blur: the blur change mode is only updated the from values / validity status after a form control lost the focus.
submit: updates are only done after form submit.
Full source is here.
来源：https://stackoverflow.com/questions/32019330/what-is-the-complete-list-of-events-supported-by-angulars-updateon-property-of