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JavaScript Interactive Web Pages with JavaScript Traversing and Manipulating the DOM with JavaScript Adding Multiple Event Listeners

Charles Harpke
Charles Harpke
33,986 Points
Posted by Charles Harpke
Charles Harpke
33,986 Points

We've got a select box that's used to navigate to a new page on the "change" event and record some analytics. We want tw

Unfortunately, I'm not able to visualize the task at hand... All I know is that I am using the addEventListener() method...

What change method am I employing on the the right side of lines 14 and 15, on the other side of the event listen?

//Select select box
var navigationSelect = document.getElementById("nav");

//Navigate to URL when select box is changed
var navigateToValue = function() {
  window.location = this.value;
}

//Send analytics data
var sendAnalytics = function() {
  //Placeholder  
}

navigationSelect.addEventListener = navigateToValue;
navigationSelect.addEventListener = sendAnalytics

2 Answers

Iago Wandalsen Prates
Iago Wandalsen Prates
21,699 Points
Iago Wandalsen Prates
Iago Wandalsen Prates
21,699 Points

You're using addEventListener wrong. addEventListener is a method, that takes a list of arguments, and add them to the eventList. It's not the eventList itself. Correct way is .addEventListener(eventToBeAdded)

Charles Harpke
Charles Harpke
33,986 Points
Charles Harpke
Charles Harpke
33,986 Points

Gotcha...thank you:

navigationSelect.addEventListener ("change", navigateToValue );
navigationSelect.addEventListener ("change", sendAnalytics);