Observer is an object which monitors or observes something continuously and it notifies after something is changed.
Mutation Observer observes the DOM tree. It waits for the changes being made to the DOM.
Mutation Observer interface will notify us when the particular element’s attributes, text or contents changed. And also it monitors the child nodes whether it has been added or removed.
Mutation Observer Flow Diagram
These are the key concepts in Mutation Observer. It is not possible to read all these concepts and understand what they are doing. So, see some use cases and code examples in further and then you will have more clear understanding.
We can use Mutation Observer wherever we want to track DOM Elements that is the core concept of Mutation Observer.
Now, I am going to take one use-case from the list and will explain it briefly. Try other use-cases on your own. It will be more interesting!
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