MediaWiki:Common.js

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$(document).ready(function() {
    mw.loader.load('ext.wikiEditor.toolbar');

    var customizeToolbar = function() {
        $('#wpTextbox1').wikiEditor('addToToolbar', {
            section: 'main',
            group: 'format',
            tools: {
                "strikethrough": {
                    label: 'Strike',
                    type: 'button',
                    icon: '//upload.wikimedia.org/wikipedia/commons/3/30/Btn_toolbar_rayer.png',
                    action: {
                        type: 'encapsulate',
                        options: {
                            pre: "<s>",
                            post: "</s>"
                        }
                    }
                }
            }
        });
    };

    /* Check if view is in edit mode and that the required modules are available. Then, customize the toolbar … */
    if ($.inArray(mw.config.get('wgAction'), ['edit', 'submit']) !== -1) {
        mw.loader.using('user.options', function() {
            // This can be the string "0" if the user disabled the preference ([[phab:T54542#555387]])
            if (mw.user.options.get('usebetatoolbar') == 1) {
                $.when(
                    mw.loader.using('ext.wikiEditor.toolbar'), $.ready
                ).then(customizeToolbar);
            }
        });
    }
    // Add the customizations to LiquidThreads' edit toolbar, if available
    mw.hook('ext.lqt.textareaCreated').add(customizeToolbar);

    var monthNames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
    x = new Date;
    var y = ' || ' + x.getFullYear() + '-' + monthNames[(x.getMonth() + 3)] + '-' + x.getDate() + ' }}';
});