Function pickTab

background_scripts/marks.js:114–131

(tabs)

// Given a list of tabs candidate tabs, pick one. Prefer tabs in the current window and tabs with
// shorter (matching) URLs.
async function pickTab(tabs) {
  // NOTE(philc): We assume getCurrent() can return null, but I didn't confirm this. Also, it should
  // be impossible for the user to invoke Vimium-related keys if all windows are closed.
  const window = await chrome.windows.getCurrent();
  const windowId = window?.id;
  // Prefer tabs in the current window, if there are any.
  const tabsInWindow = tabs.filter((tab) => tab.windowId === windowId);
  if (tabsInWindow.length > 0) tabs = tabsInWindow;
  // If more than one tab remains and the current tab is still a candidate, then don't pick the
  // current tab (because jumping to it does nothing).
  if (tabs.length > 1) {
    tabs = tabs.filter((t) => !t.active);
  }

  // Prefer shorter URLs.
  tabs.sort((a, b) => a.url.length - b.url.length);
  return tabs[0];
}