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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
Posted by 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
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
Pablo Grippo
Pablo Grippo
25,765 Points

Thank you so much Hugo Paz. It works!