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JavaScript Callback Functions in JavaScript Introduction to Callback Functions Creating an Anonymous Callback Function

Posted by karunaraina
karunaraina
1,352 Points

In the app.js file, functionRunner executes a callback, log. Convert log in to an anonymous function and pass the anonym

In the app.js file, functionRunner executes a callback, log. Convert log in to an anonymous function and pass the anonymous

app.js 
log( () => console.log("Hello World!"))


functionRunner(log);
index.html 
<!DOCTYPE html>
<html lang="en">
    <head>
        <title></title>
        <link rel='stylesheet' href='styles.css'>
    </head>
    <body>
        <section>
            <p>Open your browser's console to see the results</p>
        </section>
        <script src='runner.js'></script>
        <script src='app.js'></script>
    </body>
</html>
runner.js 
function functionRunner(callback) { 
  callback();
}

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

You're close — you've created an anonymous version of "log", but you placed it as the argument to "log" itself.

The new anonymous function should replace "log" in the call to "functionRunner" instead. Then you can completely remove anything left of the original "log".

ja5on
ja5on
10,338 Points

Steven Parker I have the same problem but i dont understand your solution?