forgejo/templates/repo/clone_script.tmpl

<script>
	// synchronously set clone button states and urls here to avoid flickering
	// on page load. initRepoCloneLink calls this when proto changes.
	// TODO: This localStorage setting should be moved to backend user config
	// so it's available during rendering, then this inline script can be removed.
	(window.updateCloneStates = function() {
		const httpsBtn = document.getElementById('repo-clone-https');
		const sshBtn = document.getElementById('repo-clone-ssh');
		const value = localStorage.getItem('repo-clone-protocol') || 'https';
		const isSSH = value === 'ssh' && sshBtn || value !== 'ssh' && !httpsBtn;

		if (httpsBtn) httpsBtn.classList[!isSSH ? 'add' : 'remove']('primary');
		if (sshBtn) sshBtn.classList[isSSH ? 'add' : 'remove']('primary');

		const btn = isSSH ? sshBtn : httpsBtn;
		if (!btn) return;

		const link = btn.getAttribute('data-link');
		for (const el of document.getElementsByClassName('js-clone-url')) {
			el[el.nodeName === 'INPUT' ? 'value' : 'textContent'] = link;
		}
	})();
</script>