MediaWiki
MediaWiki:Foreground.js
From Grouse House Wiki
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/* Collapsible Headers */ var coll = document.getElementsByClassName("c-header"); var i; for (i = 0; i < coll.length; i++) { coll[i].addEventListener("click", function() { var content = this.nextElementSibling; if (content.style.display === "block") { content.style.display = "none"; this.classList.add("hidden"); } else { content.style.display = "block"; this.classList.add("active"); } }); }