Function entryFor

frontend/src/react/hooks/useMediaQuery.test.tsx:20–27

(query: string)

    { matches: boolean; listeners: Set<MediaListener> }
  >();
  const entryFor = (query: string) => {
    let entry = registry.get(query);
    if (!entry) {
      entry = { matches: initialMatches(query), listeners: new Set() };
      registry.set(query, entry);
    }
    return entry;
  };
  window.matchMedia = ((query: string) => {
    const entry = entryFor(query);
    return {