unicode: Don't send lookup requests for empty string

1 files changed, 5 insertions, 1 deletions

diff --git a/modules/unicode/index.html b/modules/unicode/index.html
index 9335081..23492cd 100644
--- a/modules/unicode/index.html
+++ b/modules/unicode/index.html
@@ -18,6 +18,9 @@ body {
 </style>
 <script>
 function do_lookup() {
+	var input = document.getElementById("input").value;
+	if (input.length == 0) return;
+
 	var xhr = new XMLHttpRequest();
 	xhr.onreadystatechange = function() {
 		if (xhr.readyState == 4) {
@@ -28,7 +31,8 @@ function do_lookup() {
 			}
 		}
 	};
-	xhr.open("GET", "/unicode/lookup/" + encodeURIComponent(document.getElementById("input").value));
+
+	xhr.open("GET", "/unicode/lookup/" + encodeURIComponent(input));
 	xhr.responseType = "text";
 	xhr.setRequestHeader("Content-Type", "text/plain");
 	xhr.send();