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How can I count a JavaScript object’s attributes?

To count how many attributes is in the JavaScript object we can use next code:

How to move an element into another element?

to move:

to copy:

How to connect the site with in-built iframe

Sometimes developers should resolve the task – how to connect site which is in iframe tag and the parent site using JavaScript. That was the problem in the past, but not now as we can use HTML5 features. …