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JavaScript AJAX Basics AJAX Concepts A Simple AJAX Example

Rabe Datta
Rabe Datta
3,693 Points

didn't work with addEventListener

   const clickButton = document.getElementById("load");
    clickButton.addEventListener("click", () => {
      xhr.send();
      clickButton.style.display = "none";
    })

the above code didn't work with AJAX. Not sure why.

3 Answers

Robert Manolis
STAFF
Robert Manolis
Treehouse Guest Teacher

Hi Rabe, I can't say for sure without seeing all the code you're working with, but I just tested this out in the Workspace for that particular video. If you're doing what's demoed in the video, the problem is that the code bewteen the script tags is getting parsed before the HTML. So there is no DOM element with the id of "load" at the time the JS is parsed. It works in the sendAJAX function, because the code in that function doesn't run until the click occurs. And by that time, the DOM element with the id of "load" definitely exists.

If you break all the JS out into its own JS file, what you have should work fine. Or at least if worked for me when I tested it.

Hope that helps. :thumbsup:

Rabe Datta
Rabe Datta
3,693 Points

Thank you, Robert!

add a script tag before the end of the <body> tags, and insert your code. The addEventListener will work there because the DOM would have been loaded