WP 6.3 - Open "Details" block automatically on page load based on URL hash

wp-auto-open-accordion.js

// First, set a class name inside the "Details" accordion block (because we do not have ability to set the ID)
// If multiple elements with the same class name are detected, the first one will be triggered
// Append that class name after the page URL, like so: site.domain/page/#classname

if(window.location.hash) {
	var hash = window.location.hash;
	var el = document.getElementsByClassName(hash.slice(1))[0];
	
	if(!el.hasAttribute('open')){
		el.setAttribute('open', '');
	}
}