How to add an item into a json in knockout.js?

@jasen_gottlieb 

To add an item into a JSON object in Knockout.js, you can use the following approach:

1. Convert the JSON object into a Knockout observable array.
2. Use the push() method to add a new item to the observable array.
3. Convert the observable array back to a JSON object.

Here's an example code snippet:

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// Define a JSON object
var json = {
  "items": [
    { "name": "Item 1", "price": 10 },
    { "name": "Item 2", "price": 20 }
  ]
};

// Convert the JSON object into a Knockout observable array
var items = ko.observableArray(json.items);

// Add a new item to the observable array
items.push({ "name": "Item 3", "price": 30 });

// Convert the observable array back to a JSON object
var updatedJSON = { "items": items() };

console.log(updatedJSON);

In the above code, we first convert the "items" array in the JSON object into a Knockout observable array using the ko.observableArray() function. Then, we use the push() method to add a new item to the observable array. Finally, we convert the updated observable array back to a JSON object by calling items().