An example of using regex in React/node.js

Regex Example

useEffect(() => {
    const pathname = location?.pathname;
    
    const pathNameChanged = hasValue(pathname) && pathname !== prevPathname;
    
    const managedPaths = {
      // regex looks for the id and value of foo
      create: () => {
        const regex = new RegExp(`^(?:.*)(${id})(?:(?:.*)(${foo}))?`);
        const results = regex.exec(pathname) ?? [];
        return R.includes(id, results) && R.includes(foo, results);
      },
      // regext is looking of the id and value of herp
      punchCategorySettings: () => {
        const regex = new RegExp(
          `^(?:.*)(${id})(?:(?:.*)(${route.herp}))?`
        );
        const results = regex.exec(pathname) ?? [];
        return (
          R.includes(id, results) &&
          R.includes(route.herp, results)
        );
      },
    };

    const setValuesForForm = key => {
      const cachedValues = initialValuesCache[key];
      const def = defaultForms[key];
      const values = hasValue(cachedValues) ? cachedValues : def.initialValues;
      dispatch(setForm({ form: { ...def, initialValues: values } }));
    };

    if (pathNameChanged && managedPaths.create()) {
      setValuesForForm('policyCreate');
    }

    if (pathNameChanged && managedPaths.punchCategorySettings()) {
      setValuesForForm('punchCategorySettings');
    }

    // Finaly update prev path
    setPrevPathname(pathname);
  }, [location]);