getRepoUrl (useful-forks.js)

Fetches repo URL from GitHub API; injects button via DOM manipulation.

function getRepoUrl() {
  const pathComponents = window.location.pathname.split("/");
  const user = pathComponents[1], repo = pathComponents[2];
  return `https://useful-forks.github.io/?repo=${user}/${repo}`;
}

function setBtnUrl() {
  const button = document.getElementById(UF_BTN_ID);
  button.addEventListener("click", () => {
    window.open(getRepoUrl(), "_blank");
  });
}

function createUsefulBtn() {
  const li = document.createElement("li");
  const content = `
  <div class="float-left">
    <button id="${UF_BTN_ID}" class="btn-sm btn" aria-describedby="${UF_TIP_ID}">
      <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search">
          <path d="M10.68 11.74a6 6 0 0 1-7.922-8.982 6 6 0 0 1 8.982 

... (truncated -- full source via MCP)