Is there a better way to Check if the active chrome tab is a Google search result page (SERP) javascript

Is there a better way to Check if the active chrome tab is a Google search result page (SERP) javascript Apologies in advance if this is not a proper question.

currently using

// Checking if the active tab is a Google search result page (SERP)
chrome.tabs.query({ active: true }).then((tab) => {
  currentTabId = tab[0].id;
  let url = new URL(tab[0].url);
  let hostname = url.hostname;
  let q = url.searchParams.get("q");
  if (q != null && hostname.indexOf("google.com") != -1) {
    chrome.scripting.executeScript({
      target: { tabId: tab[0].id },
      files: ["content_search.js"],
    });
  } else {
    document.getElementById("invalid-message").style.display = "block";
  }
});

It intermittently triggers the invalid-message even if it's a SERP page. Then the only way to get it to work is by killing the chrome process and restarting.

Is there a better way like an API for this? Thanks in advance.