knockout.js - Regarding the usage of ko.toJSON($data, null, 2) knockout js -


it seems ko.tojson() convert json string.

<pre data-bind="text: ko.tojson($data, null, 2)"></pre>

but not understand $data because nevere declared or used in code. see full code here link http://jsfiddle.net/7e0vujf5/11/

why second argument null , meaning of 2nd 3rd argument.

thanks

$data special knockout binding context variable available inside data-bind expressions , refers view model object in current context.

the other 2 parameter controls json.stringify() method called ko.tojson

where null replacer fuction:

a function alters behavior of stringification process, or array of string , number objects serve whitelist selecting properties of value object included in json string. if value null or not provided, properties of object included in resulting json string.

and 2 space:

a string or number object that's used insert white space output json string readability purposes.


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