The WebShare API is so easy to use, it is a crime people don't use it more. Instead, we have tons of dead "share on $thing" buttons on the web. Many of which spy on your users and lots of them that started as Wordpress plugins but now are security concerns. Instead of guessing how your visitors want to share the current URL or a file you provide, you can call the API and they can pick their favourite:

This is the code and you can also check it on codepen:

let shareButton = document.querySelector('button');
shareButton.addEventListener("click", async () => {
  try {
    await navigator.share({ title: "Example Page", url: "" });
    console.log("Data was shared successfully");
  } catch (err) {
    console.error("Share failed:", err.message);
  }
});

An empty url means the current document is shared. You can also add a different title, which makes more sense than "Example page".