How I do for JavaScript loads after HTML in this application.

This causes me many errors at the time of creating code because I do not know the dom elements identical.

9th Sep 2025, 4:57 AM

Ale-int

2 Answers

+ 1

This is a common problem when JavaScript runs before the HTML elements exist in the DOM. There are several ways to fix it. Here’s a clear guide: 1. Place <script> at the End of <body> The easiest way is to put your JavaScript just before the closing </body> tag. <!DOCTYPE html> <html> <head> <title>My App</title> </head> <body> <div id="myDiv">Hello</div>  <script src="script.js"></script> </body> </html> 2. Use defer in <script> If you want to keep your JS in <head>, add the defer attribute: <head> <script src="script.js" defer></script> </head> defer makes the script wait until HTML is fully parsed. Works well for external JS files. 3. Use DOMContentLoaded Event Wrap your JS code so it only runs after the DOM is ready: <script> document.addEventListener("DOMContentLoaded", function() { const myDiv = document.getElementById("myDiv"); myDiv.textContent = "Hello, DOM is ready!"; }); </script> Useful if you cannot move the <script> tag to the bottom or use defer. Good Luck!

11th Sep 2025, 3:16 PM

Riyadh JS

In your script tag use defer which causes the script and the HTML to load in parallel. There's is one more way you can add the whole JS inside DOMContentLoaded event this makes whole JS to load after HTML is loaded thus if there are any event listener in JS they won't show 'null type error' There's a special case where you might have wrote JS within some event now you want to use that function globally you can use this after you have defined the function: window.function_name = function_name Replace function_name with the function. It changes the function from local to global scope.

10th Sep 2025, 3:27 AM

Snehil Pandey