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

Posted by worawut wattana
worawut wattana
7,989 Points

get stuck at adding-multiple-event-listeners

//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("onchange" ,navigateToValue); navigationSelect.addEventListener("onchange" ,sendAnalytics);

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("onchange" ,navigateToValue);
navigationSelect.addEventListener("onchange" ,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>

3 Answers

rydavim
rydavim
18,814 Points
rydavim
rydavim
18,814 Points

You're very close, you just have a small syntax issue. When adding your event listeners, you want to bind it to 'change' instead of 'onchange'. That should do it! Happy coding! :)

Bob McCarty
PLUS
Bob McCarty
Courses Plus Student 16,618 Points
Bob McCarty
Bob McCarty
Courses Plus Student 16,618 Points

Try

navigationSelect.addEventListener("change", navigateToValue);
navigationSelect.addEventListener("change", sendAnalytics);
worawut wattana
worawut wattana
7,989 Points
worawut wattana
worawut wattana
7,989 Points

Thank you rydavim and bob I have passed :)