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I'm doing some JavaScript debugging with Chrome dev tools and found the following oddity.
How is it possible that date has a different value when the object is expanded?
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The dir() method displays an interactive list of the properties and methods of the specified JavaScript object.
Prototype is used to add new properties and methods to an object.
One way is to add a property using the dot notation: obj. foo = 1; We added the foo property to the obj object above with value 1.
Using the same method, an object's property can be modified by assigning a new value to an existing property. At this point, if we call the object, we will see all of our additions and modifications. Through assignment operation, we can modify the properties and methods of a JavaScript object.
You should be careful with chrome console when printing objects. Please note that chrome does evaluations when printing / expanding objects as well as it does it asynchronously (meaning other code may execute in the meantime and change the object). Always try to print to String for debugging, rather than printing the object itself.
I made a very simple example to illustrate the problem.
<div id="foo"></div>
console.log($('#foo')); //expected output [div#foo...]
$('#foo').attr('id','hello');
The actual output in the chrome console is:
Try it yourself here (JSFiddle).
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