index.html

<script>
	function copyTextToClipboard(doc, text) {
		var textArea = doc.createElement("textarea");

		// Place in the top-left corner of screen regardless of scroll position.
		textArea.style.position = 'fixed';
		textArea.style.top = 0;
		textArea.style.left = 0;

		// Ensure it has a small width and height. Setting to 1px / 1em
		// doesn't work as this gives a negative w/h on some browsers.
		textArea.style.width = '2em';
		textArea.style.height = '2em';

		// We don't need padding, reducing the size if it does flash render.
		textArea.style.padding = 0;

		// Clean up any borders.
		textArea.style.border = 'none';
		textArea.style.outline = 'none';
		textArea.style.boxShadow = 'none';

		// Avoid flash of the white box if rendered for any reason.
		textArea.style.background = 'transparent';
		textArea.value = text;

		doc.body.appendChild(textArea);
		textArea.focus();
		textArea.select();

		try {
			var successful = doc.execCommand('copy');
			var msg = successful ? 'successful' : 'unsuccessful';
			console.log('Copying text command was ' + msg + text);
		} catch (err) {
			console.log('Oops, unable to copy');
		}

		doc.body.removeChild(textArea);
	}

	const streamlitDoc = window.parent.document;
	// const buttons = Array.from(streamlitDoc.querySelectorAll('.stButton > button'));
	// const share_buttom = buttons.find(el => el.innerText === 'Share');

	var text = "http://" + "fiddle.databend.rs" + "?sql=" + encodeURI(copy_text);
	copyTextToClipboard(streamlitDoc, text);

</script>