Check the first TypeError
Open F12 → Console and focus on the first error, as it usually identifies the root cause.Prevent null element errors
Check that an element exists before using it:
const element = document.querySelector('.selector');
if (element) {
element.addEventListener(...);
}
Load scripts after the DOM is ready
Wrap your initialization code in DOMContentLoaded.Check for plugin conflicts
Temporarily disable cache/optimization plugins and test other plugins one by one.Clear JavaScript optimization
Disable JavaScript minification/combination, clear caches, and reload the page.Update everything
Update WordPress, the active theme, and the calendar plugin to ensure compatibility.
