网页文本框获取URL返回值 - 前端代码实现

<label for='response-output'>返回值展示:</label>
<textarea id='response-output' rows='10'></textarea>

<button onclick='getUrlResponse()'>获取返回值</button>

<script>
	function getUrlResponse() {
		var url = document.getElementById('url-input').value;
		var xhttp = new XMLHttpRequest();
		xhttp.onreadystatechange = function() {
			if (this.readyState == 4 && this.status == 200) {
				document.getElementById('response-output').value = this.responseText;
			}
		};
		xhttp.open('GET', url, true);
		xhttp.send();
	}
</script>