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JavaScript JavaScript and the DOM (Retiring) Responding to User Interaction The Event Object

Lu Favela
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Lu Favela
Front End Web Development Techdegree Student 14,611 Points
Posted by Lu Favela
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Lu Favela
Front End Web Development Techdegree Student 14,611 Points

Im a little confused about the "event.target", Versus "event.target.tagName"

Im still trying to understand the concept of event "bubbling" and "DOM traversal". I get really confused on when to use either pieces of code or how to apply it. Does "tagName" work similar to "document.elementsbyTagName"?

1 Answer

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

Assuming "event" is the parameter to an event handler (the callback function of "addEventListener"), then:

  • event.target is a reference to the element that generated the event
  • event.target.tagName is the "tagName" property of that element — note that tag names are UPPER CASE

"document.getElementsByTagName()" is a function that you can use to find all the elements of a particular kind. Case is ignored so the argument should be lower case.