How to convert data between model and view in knockout.js?

@brandy 

In Knockout.js, data can be converted between the model and view using bindings. Bindings allow you to bind HTML elements to properties in your view model, so that changes in the view are reflected in the model and vice versa.

When using knockout.js, you can use the ko.observable() and ko.observableArray() functions to create observables that are bound to your view model properties. Whenever the value of an observable changes, it automatically updates any elements in the view that are bound to that observable.

Here's a basic example of converting data between model and view in Knockout.js:

1. Define your view model:

1
2
3
4
5
6
7

function ViewModel() {
    this.name = ko.observable("John");
    this.age = ko.observable(30);
}

var viewModel = new ViewModel();
ko.applyBindings(viewModel);

1. Create HTML elements and bind them to your view model properties using data-bind attributes:

1
2
3
4
5
6
7
8

<div>
    <label>Name:</label>
    <input type="text" data-bind="value: name" />
</div>
<div>
    <label>Age:</label>
    <input type="number" data-bind="value: age" />
</div>

In this example, the value bindings are used to bind the name and age properties of the view model to the input elements. Whenever the values in the input elements change, the corresponding properties in the view model will be updated automatically.

You can also create custom bindings and converters in Knockout.js to customize the way data is converted between the view and model. For more advanced scenarios, refer to the official Knockout.js documentation for detailed examples and techniques.