mbest/knockout-freedom

Frees each binding from being updated by updates to its siblings.

knockout-freedom's Issues

knockout computed read and write

Hi, I have a computed function with read and write.
now when I write to the computed function I wanted to apply some validation logic in the write part. if the validation fails, I don,t want it to be written to the computed function. also I don't want the subscription to happen which is already configured to the computed function.

please advice.

what does this plugin do?

This plugin will solve knockout/knockout#321 without having to use a fork of Knockout. This plugin will be compatible with versions 2.1 (current) and 2.2 (upcoming) of Knockout.

Incompatibility with Knockout-Validation

I'm having trouble using this plugin with Knockout-Validation. I can provide examples if necessary. Any ideas?

AMD compatible?

Several of your other plugins are AMD-compatible; plans to add that to this one?

mandatory textbox and just tabbing out should show the required error message.

Hi,
1st requirement - I have designed a form which has two text input control. where both are mandatory. now when the user just tabs out without entering and the text box looses focus the error message should be displayed. I am using knockout-validation with custom rules written.

2nd requirement - on click of the submit button, for all the text input if the rule fails it should show error message.

currently I am using hasfocus with few rules written to it. it works, but in chrome/safari and firefox 22 it takes 2 tabs to come out of the text input.

please advice.

why not use a computed as the wrapped value?

ko.bindingValueWrap currently wraps the binding value using a psuedo-observable function. It may seem like ko.computed would do the job just as well. That is actually true (mostly). The problem with using ko.computed here is that it needs to be disposed when the element is removed, but there's currently no way to get the element in ko.bindingValueWrap. This would change If/when knockout/knockout#474 is included in Knockout.

ko.bindingValueWrap using ko.computed and element:

ko.bindingValueWrap = function(element, valueAccessor, valueWriter) {
    var valueFunction = ko.computed({
        read: function() {
            return ko.utils.unwrapObservable(valueAccessor());
        },
        write: function(valueToWrite) {
            var value = valueAccessor();
            if (ko.isObservable(value)) {
                value(valueToWrite);
            } else if (valueWriter) {
                valueWriter(valueToWrite);
            }
        },
        disposeWhenNodeIsRemoved: element
    });
    ...
    return valueFunction;
};

Here's a version that could work right now, but doesn't dispose the computed until it's updated:

ko.bindingValueWrap = function(valueAccessor, valueWriter) {
    var valueFunction = ko.computed({
        read: function() {
            return ko.utils.unwrapObservable(valueAccessor());
        },
        write: function(valueToWrite) {
            var value = valueAccessor();
            if (ko.isObservable(value)) {
                value(valueToWrite);
            } else if (valueWriter) {
                valueWriter(valueToWrite);
            }
        },
        disposeWhen: function() {
            return !valueFunction.getSubscriptionsCount();
        }
    });
    ...
    return valueFunction;
};

Incompatibility with Ryan's knockout-classBindingProvider

I'm not sure whether this is an issue that's fixable or if it's something that obviously can't work, but I found some of my bindings are not working when both this and knockout-classBindingProvider are included. I realize I haven't provided any details, since I haven't narrowed it down.

Clarify if this does still apply to KO 3.x

If I understood this correctly the "knockout-freedom" behaviour is now the default behaviour in KO3. Is it true?
Otherwise: is this compatible with KO3?

mandatory textbox and just tabbing out should show the required error message.

Hi,
1st requirement - I have designed a form which has two text input control. where both are mandatory. now when the user just tabs out and the text box looses focus the error message should be displayed. I am using knockout-validation with custom rules written.

2nd requirement - on click of the submit button, for all the text input if the rule fails it should show error message.

currently I am using hasfocus with few rules written to it. it works, but in chrome/safari and firefox 22 it takes 2 tabs to come out of the text input.

please advice.