I am using $dirty to check the changes in a form ,but if i type something in the input box and remove it, the $dirty is still true.Is there any solution or it will work like this.
That is by design. Any form becomes $dirty whenever the user interacts with it, and you cannot undo the interaction event. Though you can restore defaults, that is clearly not the same.
Consider using $watch to check whether new value is different from the default one, and $setPristine() to clear user input.
$dirty means The field has been modified one more time. for compare your model by your previous model you can use $watch in controller.
if your field is empty you have a solution must set required attribute and in your input tag and use below code set ng-validate of your form to novalidate and then use below code for compare:
formName.inputName.$dirty && formName.inputName.$error.required
$Dirty refers to the form field is modified and you want to check using $pristine
Related
I am seeing this in Edge and IE.
I have a checkbox which is being initialized using initialValues to true.
On first visit its is displayed correctly as checked with a value of true, however after refreshing the page via the browser, the checkbox is not checked but still has a value of true. As i can continue to refresh the page the checkbox continues to switch in this way checked then unchecked on next refresh. redux form 7.2.3 react 15.6.2.
Thanks
The value of a checkbox is what will be associated with its name if it is checked. Checking a checkbox should not change the value, it should change the checked property.
This is not specific to redux-form, it is just how form elements are intended to work. It looks like redux-form wants to use value instead, and it doesn't work right.
In any case, I think you want to specifically handle the checked property with something like checked={value}.
Roy's answer is correct. Adding some redux-form context, passing checked to a Field component will override the normal behaviour. The normal behaviour is to compare if the value stored in redux-form's state is the same as the value prop specified on Field if so the checked prop is true.
So for example if the store state is values: { test: true } and your Field has value={true} then the end result is the checked prop is true.
The F5 refreshing toggle most likely suggests that your values initialization is changing on each refresh. It's hard to help you beyond a general statement like this without clear reproduction steps.
I am facing one problem with textbox in angularjs.
When I am updating textfield data by some way(Like clicking button) then ng-change is not working. Please check plnkr
[https://plnkr.co/edit/32eE0ejSNBTkWJ4LVErR?p=preview][1]
When I am updating first name on button click ng-change is not firing, but when i am changing first name in textfield ng-change is getting fired
This behaviour is intended. It says this in the official documentation:
The ngChange expression is only evaluated when a change in the input
value causes a new value to be committed to the model.
It will not be evaluated:
if the value returned from the $parsers transformation pipeline has
not changed
if the input has continued to be invalid since the model will stay null
if the model is changed programmatically and not by a change to the input value
source
In your case, the last item in that list applies.
if the model is changed programmatically and not by a change to the input value
You'll have to use a watch in this case.
For example, ng-required calls $isEmpty to determine if it should set ng-invalid-required, etc. What does Angular call to decide if it should set ng-dirty?
The dirty state indicates whether it is modified to some actions or not
Hope I have understood your question correctly. If not please let me know.
You can use $setDirty(); method to Sets the form to a dirty state..This method can be called to add the ng-dirty class and set the form to a dirty state (ng-dirty class).
Angular detects this by using $dirty property.It is a boolean property. If it is True then user has already interacted with the form.
We can use $setPristine() method to Sets the form to its pristine state.This method can be called to remove the ng-dirty class and set the form to its pristine state (ng-pristine class).We use this method when we want to reuse a form after saving or resetting it.
Angular detect this by using $pristine property.It is a boolean property. If it is True then user has not interacted with the form yet.
i am using angularjs' form stuff to gather user information. to get time i user <timpicker> it seems that this field is not set (ng-model of timepicker is null) if i call my ng-submit="submit()".
The only way i found so far is to call ng-change in timepicker and set a viable in scope which is then used in submit. Beside the fact that this is ugly, the main problem is if the user doesn't change the value (default is now) i don't have a time.
Is there a way to gather all ng-model variables in $scope on form's "ng-submit"?
EDIT It is not a problem of form its problem of timepicker. As soon as i change the time once the model gets filled (without the need of change method)
It will gather all ng-model variables on $scope that are set on input fields within the form. If you want to add a variable to your form without actually showing it on the screen, you can do:
<input type="hidden" ng-model="yourVariable" />
I wanted to have a Dialog box for asking to save the current changes or not. For that I was searching for an event in AngularJS which triggers on change of any scope variable.
As per my logic I will achieve this by creating event on every control and update a variable to say 'Modified' else will have default value.
Is there any other way? Since my logic will need an event on every control.
If you're using a form directive, this is pretty simple. The value of myForm.$dirty will be true if any property has changed. You can even check an individual field with myForm.myField.$dirty.
If you're not using a form, you should probably consider it for what it sounds like you're trying to accomplish. One of my favorite angular features as it makes validation, etc. a breeze!
Reference: angular docs
Take a look at $scope.$watch(...) on the Angular docs, there is a great discussion on how $watch works here on another Stack Overflow question
You should, at the very least, be able to trigger alerts when specific scope-elements have changed. If you are using a form, then the $dirty approach above is absolutely a brilliant way to go.