Javascript Question
knockout.js subscribe is not getting called on the first set
I have a simple model class with observables. I simply want to subscribe to its sets. Here is the code that I have:
var dto = function (data) {
var self = this;
self.Value1 = ko.observable(data.Value1);
self.Value1.subscribe(function(){
console.log('here');
});
};
the console.log doesn't get called when the Value1 is first set (i.e. ko.observable(data.Value1)
How do I set it up that subsribe function happens on both initial and when it changes.
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Answer Source
There is no real support for triggering the subscribe function for the initial values.
What you can do is to call the valueHasMutated function after your subscribe:
self.Value1.subscribe(function(){
console.log('here');
});
self.Value1.valueHasMutated();
Or you can just set your initial values after you've subscribed:
var dto = function (data) {
var self = this;
self.Value1 = ko.observable(); // only declare but not assign
self.Value1.subscribe(function(){
console.log('here');
});
self.Value1(data.Value1); // assign initial value
};
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