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

Yohan Aton
Yohan Aton
1,738 Points
Posted by Yohan Aton
Yohan Aton
1,738 Points

Drawing a blank on the solution...

Hi, thanks for taking a sec. If you can post the solution, I believe I can see it and understand it.

Thank You!!!

//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.change.addEventListener() = navigateToValue;
navigationSelect.change.addEventListener() = sendAnalytics;
Steven Parker
Steven Parker
229,744 Points
Steven Parker
Steven Parker
229,744 Points

Remember to select "best answer". :)

2 Answers

Steven Parker
Steven Parker
229,744 Points
Steven Parker
Steven Parker
229,744 Points

SPOILER ALERT

You had the right idea to create additional event "listeners", each of which will invoke a function when the event occurs. But instead of using assignments the call takes two arguments, first the type of event to respond to, and the next is the function to invoke.

So change the last two lines to:

navigationSelect.addEventListener("change", navigateToValue);
navigationSelect.addEventListener("change", sendAnalytics);
Mark Miller
Mark Miller
45,831 Points
Mark Miller
Mark Miller
45,831 Points

How did you know of the event called "change" for the select menu with the id "nav"? I understand that "change" represents the event when a visitor selects an option from the select menu, but the only place where I see the word "change" representing this event is here in the Treehouse community forum. I am unable to find the word "change" representing an event, for the selection of an option from a menu, anywhere in the Mozilla Developer Network documentation for the addEventListener. Now I could pass this quiz, but I did not know why it was "change" representing the event. So, in the future, I am not able to find the names of the events that could trigger the listeners.