Dev

javascript/buffer.js

@@ -4,6 +4,24 @@ https://turfjs.org/docs/
 */
 
 function makeBuffer() {
+    
+    // Sjekk av faktisk og gyldig input:
+    
+    var regex_1 = /^[0-9]+$/;
+    var regex_2 = /^[a-zA-Z_0-9]+$/;
+    
+    if (document.getElementById("bufferSelect").value == "- - -") {
+        return alert("You need to choose a layer!");
+    } else if (!document.getElementById("bufferDistance").value) {
+        return alert("You need to set a distance as an integer!");
+    } else if (!document.getElementById("bufferDistance").value.match(regex_1)) {
+        return alert("You need to set a distance as an integer!");
+    } else if (!document.getElementById("bufferName").value) {
+        return alert("You need to choose a name for the new layer!");
+    } else if (!document.getElementById("bufferName").value.match(regex_2)) {
+        return alert("The new name must consist of normal letters!");
+    }
+
     var input = document.getElementById("bufferSelect").value;
     var layer = overlayMaps[input].toGeoJSON();
     var distance = parseFloat(document.getElementById("bufferDistance").value);