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

Pablo Grippo
Pablo Grippo
25,765 Points

I have a problem with the event handler.

I wrote this:

navigationSelect.addEventListener = ('change', navigateToValue); navigationSelect.addEventListener = ('change', sendAnalytics);

But it says me that I haven't any 'change' in the addEventListener method. What am I doing wrong? Please help me!

app.js
//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 = ('change', navigateToValue);
navigationSelect.addEventListener = ('change', sendAnalytics);
index.html
<!DOCTYPE html>
<html>
  <body>
    <select id="nav">
      <option value="index.html">Home</option>
      <option value="about.html">About</option>
    </select>
    <h1>Home</h1>
    <script src="app.js"></script>
  </body>
</html>
about.html
<!DOCTYPE html>
<html>
  <body>
    <select id="nav">
      <option value="index.html">Home</option>
      <option value="about.html">About</option>
    </select>
    <h1>About</h1>
    <script src="app.js"></script>
  </body>
</html>

1 Answer

Hugo Paz
Hugo Paz
15,622 Points

HI Pablo,

Just change the last 2 lines from:

navigationSelect.addEventListener = ('change', navigateToValue);
navigationSelect.addEventListener = ('change', sendAnalytics);

to

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

And it should work.

Pablo Grippo
Pablo Grippo
25,765 Points

Thank you so much Hugo Paz. It works!