Common.js

Note: After saving, you may have to bypass your browser's cache to see the changes.

• Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
• Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
• Internet Explorer / Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5
• Opera: Go to Menu → Settings (Opera → Preferences on a Mac) and then to Privacy & security → Clear browsing data → Cached images and files.

/* Any JavaScript here will be loaded for all users on every page load. */
/*
 * addToolbarButtons.js
 * version 2019-05-09
 *
 * This function lets you add function-calling buttons
 * to the toolbar above the textarea, regardless of whether the user is using
 * the legacy/classic (2006) editing toolbar (now only available as a gadget),
 * or the newer, 2010 wikitext editor. (The visual editor is not supported).
 *
 * Home: //en.wikipedia.org/wiki/User:V111P/js/addToolbarButtons
 * You can use this code under the license CC0
 */

// add a single button or several buttons from the supplied array
// or else add all buttons specified in the array window.toolbarButtonsToAdd
mediaWiki.libs.addToolbarButtons = window.addToolbarButtons = function (props) {
	"use strict";

	if ($.inArray(mw.config.get( 'wgAction' ), ['edit', 'submit']) == -1)
		return; // not source-editing a page

	if (!props || props[0]) {
		var arr = props || window.toolbarButtonsToAdd || [];

		$.each(arr, function (i, val) {
			if (typeof val == 'object' && !val[0])
				mediaWiki.libs.addToolbarButtons(val);
		});

		arr.length = 0;
		return;
	}

	var button = {
		id: '',
		tooltip: '',
		section: 'main',
		group: 'insert',
		iconUrl: '//upload.wikimedia.org/wikipedia/commons/'
			+ 'thumb/1/1a/White_pog.svg/22px-White_pog.svg.png'
	}
	$.extend(button, props || {});

	function error(msg) {
		if (window.console && console.error)
			console.error('addToolbarButtons.js: ' + msg);
	}

	if (!button.id) {
		error('No button id specified.');
		return;
	}

	if ($('#' + button.id)[0]) {
		error('An element with id ' + button.id + ' already exists on the page.');
		return;
	}

	if (!props.iconUrl && !props.iconUrlClassic)
		button.iconUrlClassic = '//upload.wikimedia.org/wikipedia/commons/e/ec/Button_base.png';

	button.before = (typeof button.before == 'string' ? button.before : '');
	button.between = (typeof button.between == 'string' ? button.between : '');
	button.after = (typeof button.after == 'string' ? button.after : '');
	button.inserts = (button.before + button.between + button.after).length > 0;
	if (!button.callback && !button.inserts) {
		error('Neither a callback function nor characters to insert specified.');
		return;
	}

	// add button to the new, WikiEditor, toolbar
	function customizeBetaToolbar() {
		var tools = {};
		tools[button.id] = {
			label: button.tooltip,
			type: 'button',
			icon: button.iconUrl,
			action: {
				type: (button.inserts ? 'encapsulate' : 'callback'),
				execute: (button.inserts ? void(0) : button.callback),
				options: (button.inserts ? {
					pre: button.before,
					peri: button.between,
					post: button.after
				} : void(0))
			}
		};
		$('#wpTextbox1').wikiEditor('addToToolbar', {
			'section': button.section,
			'group': button.group,
			'tools': tools
		});
		var btn = $('.tool-button[rel="' + button.id + '"]').attr('id', button.id);
		if (button.inserts && button.callback)
			btn.click(button.callback);
	}

	mw.loader.using( 'user.options', function () {
		if ( mw.user.options.get('usebetatoolbar') ) {
			mw.loader.using( 'ext.wikiEditor', function () {
				$( customizeBetaToolbar );
			} );
		}
		else if (mw.toolbar && mw.toolbar.addButton) {
			// add a button to the classic toolbar
			var tempButtonId = button.id + (!button.inserts ? 'TempButton' : '');
			mw.toolbar.addButton(
				(button.iconUrlClassic || button.iconUrl),
				button.tooltip,
				button.before, button.after, button.between,
				tempButtonId,
				tempButtonId
			);
			if (button.inserts) {
				button.callback && $('#' + button.id).click(button.callback);
			}
			else {
				var $tempButton = $('#' + tempButtonId);
				if ($tempButton[0]) {
					// clone the button to remove added event handlers
					// if not done the selection in the textarea is collapsed
					// before the callback function is called
					var newB = $tempButton[0].cloneNode();
					newB.id = button.id;
					$tempButton.after(newB).remove();
					$(newB).click(button.callback);
				}
			}
		}
	});

};

mediaWiki.libs.addToolbarButtons.version = 1000;

try { // $() doesn't work after errors from other scripts, so try directly first:
	mediaWiki.libs.addToolbarButtons();
}
catch (e) { // error - page still loading
	$(mediaWiki.libs.addToolbarButtons);
}