I’m having trouble with immediately invoked function expressions in my JavaScript code. When I try to run an IIFE in both Chrome and Firefox, nothing happens at all.
Here’s what I’m trying to do:
(function() {
console.log("Hello World");
})();
The function should execute right away but it’s not working. I made sure my HTML structure is correct and other JavaScript on the page runs fine. Are there any known issues with IIFEs in recent browser versions? I expected this to work automatically when the page loads but I’m not seeing any output. What could be preventing this from running?
good point! always a good idea to check where yr scripts are, if they run too early, it could mess things up. wrapping it in a load event is def a good move if u suspect timing trouble.
Your IIFE syntax looks fine. I had the same issue last month - turned out a JavaScript error earlier on the page was silently breaking everything. Check your console for errors before the IIFE runs. Even tiny syntax errors in previous script tags can kill all the JS that comes after. Try moving your IIFE to the top of the page temporarily to see if that fixes it. Also check if you’ve got ad blockers or extensions running - they can mess with JS execution and console output depending on their settings.
Your IIFE syntax is correct, and it should execute in any modern browser. The issue might be related to not checking the console properly. Ensure that you have the developer tools open (F12 or Ctrl+Shift+I) and that you are on the Console tab. I’ve encountered similar situations before where the function was executing, but the output wasn’t visible because I was checking the wrong area. Additionally, consider where your script is placed in relation to your DOM elements; however, since you are using console.log, that shouldn’t be a concern. As a quick test, try adding an alert() inside your IIFE to see if it executes.