Trigger Knockout bindings once the ajax request has been completed

Question

Trigger Knockout bindings once the ajax request has been completed

In the view, I have the following script:

<script>           
        MyObj.initModel(getUrl);            
        $(document).ready(function () {                
            ko.applyBindings(MyObj.viewModel, document.getElementById("someId")); 
        });
    </script>

Within the initModel(getUrl) function, there is an ajax call that sets the view model (MyObj.viewModel) using ko.mapping.fromJS(response); upon success.

This viewModel is then bound to a partial view.

Is it possible to applyBindings only AFTER the ajax call completes?

I attempted to achieve this by modifying my script on the view like so:

`$("#someId").ajaxComplete(function () { ko.applyBindings(MyObj.viewModel, document.getElementById("someId")); });`

However, this approach results in a knockout error regarding multiple bindings of the same element.

javascript ajax asp.net-mvc knockout.js

Answer 1

Answer №1

$(document).ready(function () { 
    var setCallback = function () {                
        ko.applyBindings(MyObj.viewModel, document.getElementById("someId")); 
    }; 

    MyObj.initializeModel(getUrl, setCallback);
});

next, within your initializeModel function, simply invoke the setCallback method within the AJAX response function by inserting something similar to setCallback(); inside it.

Answer 2

$(document).ready(function () { 
    var setCallback = function () {                
        ko.applyBindings(MyObj.viewModel, document.getElementById("someId")); 
    }; 

    MyObj.initializeModel(getUrl, setCallback);
});

next, within your initializeModel function, simply invoke the setCallback method within the AJAX response function by inserting something similar to setCallback(); inside it.

Answer 3

Answer №2

In my approach to loading data, I have incorporated the method within my viewmodel. Upon successful completion of the ajax call, I simply apply bindings on 'self'.

ko.applyBindings(self, document.getElementById("someId"));

I have defined 'self' at the beginning of my viewmodel.

var self = this;

Additionally, after learning about how to implement the promise pattern from jQuery ajax, I wanted to share the knowledge with others. By making the initModel function return the result of the ajax call, one can utilize when() and then() as follows:

$(document).ready(function () {
    $.when(MyObj.initModel(getUrl)).then(function() {
        ko.applyBindings(MyObj.viewModel, document.getElementById("someId"));
    });
});

function MyObj() {
    this.initModel = function(getUrl){
        return $.ajax({url: getUrl});
    }
}

Please note that this code is untested.

Answer 4

In my approach to loading data, I have incorporated the method within my viewmodel. Upon successful completion of the ajax call, I simply apply bindings on 'self'.

ko.applyBindings(self, document.getElementById("someId"));

I have defined 'self' at the beginning of my viewmodel.

var self = this;

Additionally, after learning about how to implement the promise pattern from jQuery ajax, I wanted to share the knowledge with others. By making the initModel function return the result of the ajax call, one can utilize when() and then() as follows:

$(document).ready(function () {
    $.when(MyObj.initModel(getUrl)).then(function() {
        ko.applyBindings(MyObj.viewModel, document.getElementById("someId"));
    });
});

function MyObj() {
    this.initModel = function(getUrl){
        return $.ajax({url: getUrl});
    }
}

Please note that this code is untested.

Trigger Knockout bindings once the ajax request has been completed

Answer №1

Answer №2

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