MediaWiki:Chameleon.js

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$( document ).ready(function() {
	if ($('body.page-Everybodywiki_FAQ').length > 0) {
		$('.card-header').each(function() {
		    $(this).addClass("collapsed");
		});
    };
	
	var faqCheckbox = $('#faqCheckbox');
	var faqCheck = false;
	faqCheckbox.click(function() {
		console.log('click');
		if (faqCheck == false) { faqCheckbox.text("☑"); faqCheck = true; }
		else { faqCheckbox.text("🟦"); faqCheck = false; }
		$('#faqCheckboxDiv').toggle();
	});
});

This page "Chameleon.js" is from Wikipedia if otherwise notified.