MediaWiki:Common.js

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mw.loader.using(['mediawiki.util']).then(function () {

    function injectThemeOption(container) {
    	
    	function createRadio(id, label) {
		    const radioWrapper = document.createElement('div');
		    radioWrapper.className = 'citizen-client-prefs-radio';
		
		    const input = document.createElement('input');
		    input.type = 'radio';
		    input.name = 'lt-theme-group';
		    input.id = id;
		    input.className = 'citizen-client-prefs-radio__input';
		
		    const icon = document.createElement('span');
		    icon.className = 'citizen-client-prefs-radio__icon';
		
		    const labelEl = document.createElement('label');
		    labelEl.className = 'citizen-client-prefs-radio__label';
		    labelEl.htmlFor = id;
		    labelEl.textContent = label;
		
		    radioWrapper.appendChild(input);
		    radioWrapper.appendChild(icon);
		    radioWrapper.appendChild(labelEl);
		
		    return radioWrapper;
		}

        if (document.getElementById('lt-theme-test')) return;

        // Portlet wrapper
        const wrapper = document.createElement('div');
        wrapper.id = 'lt-theme-test';
        wrapper.className = 'mw-portlet citizen-menu';

        // Heading
        const heading = document.createElement('div');
        heading.className = 'citizen-menu__heading';
        heading.textContent = 'Theme';

        // Content wrapper
        const content = document.createElement('div');
        content.className = 'citizen-menu__content';

        // UL
        const list = document.createElement('ul');
        list.className = 'citizen-menu__content-list';

        // LI
        const item = document.createElement('li');
        item.className = 'mw-list-item mw-list-item-js';

        // Inner div (matches Citizen structure)
        const innerDiv = document.createElement('div');

        // FORM (this is important for spacing)
        const form = document.createElement('form');

        form.appendChild(createRadio('lt-theme-default', '🎭 Velvet'));
		form.appendChild(createRadio('lt-theme-red', '🚇 Mementos'));
		form.appendChild(createRadio('lt-theme-blue', '⚖️ Courtroom'));

        // Assemble hierarchy
        innerDiv.appendChild(form);
        item.appendChild(innerDiv);
        list.appendChild(item);
        content.appendChild(list);
        wrapper.appendChild(heading);
        wrapper.appendChild(content);

        container.appendChild(wrapper);
    }

    const observer = new MutationObserver(function () {
        const container = document.querySelector('.citizen-preferences-content');
        if (container) {
            injectThemeOption(container);
        }
    });

    observer.observe(document.body, { childList: true, subtree: true });

});