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JavaScript Introduction to jQuery DOM Traversal Why We Traverse the DOM

Learning coding
Learning coding
Front End Web Development Techdegree Student 9,937 Points

Can someone elaborate on this video starting from 3.06?

I rewatched this part of the video twice and read the transcript and still don't understand what is happening. What I understand is that the goal is to minimize the times the Dom is searched. I understand that that would be more effective, but how is that more effective? Can someone elaborate on how this works?

1 Answer

Steven Parker
Steven Parker
220,415 Points

It's primarily a matter of efficiency.

As you suspected, fewer and/or more limited searches improve performance. It's faster to avoid replicating tasks than to do them repeatedly.

Also, there are many times when you have only a specific element to begin with, and DOM traversal will allow you to find a related element where no search could be constructed.