KnockoutJS subscribe to multiple observables with same callback action

Question

I\'ve got a model class in KnockoutJS which has multiple values that I\'d like to subscribe to. Each subscription will perform the same task, like so:

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Answer 1

You can create some kind of an extension for this purpose. Simple example:

function subscribeMany(callback, observables) {    
    for (var i = 0; i < observables.length; i++) {
        observables[i].subscribe(callback);
    }
}

Usage:

var name = ko.observable();
var email = ko.observable();

var callback = function(value) {
    console.log(value);
};

subscribeMany(callback, [name, email]);

name('test 1')
email('test 2')