gitea/web_src/js/modules/fomantic/tab.ts

import $ from 'jquery';
import {queryElemSiblings} from '../../utils/dom.ts';

export function initFomanticTab() {
  $.fn.tab = function (this: any) {
    for (const elBtn of this) {
      const tabName = elBtn.getAttribute('data-tab');
      if (!tabName) continue;
      elBtn.addEventListener('click', () => {
        const elTab = document.querySelector(`.ui.tab[data-tab="${tabName}"]`)!;
        queryElemSiblings(elTab, `.ui.tab`, (el) => el.classList.remove('active'));
        queryElemSiblings(elBtn, `[data-tab]`, (el) => el.classList.remove('active'));
        elBtn.classList.add('active');
        elTab.classList.add('active');
      });
    }
    return this;
  };
}