detectOldValuenewValueOperation.js

This onChange Client script comes handy when dealing with Glide List type fields where we have to detect whether the value was added or removed and return the sysIDs of items which was added/removed.

Author: SrijanPatwa

Client-Side Components/Client Scripts/Detect oldValue newValue and Operation in Glide List Type Fields/detectOldValuenewValueOperation.js

@@ -0,0 +1,35 @@
+function onChange(control, oldValue, newValue, isLoading, isTemplate) {
+    if (isLoading) {
+        return;
+    }
+
+
+    var prevValue;
+    if (g_scratchpad.prevValue == undefined)
+        prevValue = oldValue;
+    else {
+        prevValue = g_scratchpad.prevValue;
+    }
+    g_scratchpad.prevValue = newValue;
+
+
+    var oldGlideValue = prevValue.split(',');
+    var newGlideValue = newValue.split(',');
+
+
+    var operation;
+
+    if (oldGlideValue.length > newGlideValue.length || newValue == '') {
+        operation = 'remove';
+    } else if (oldGlideValue.length < newGlideValue.length || oldGlideValue.length == newGlideValue.length) {
+        operation = 'add';
+    } else {
+        operation = '';
+    }
+
+    g_form.clearMessages();
+    g_form.addSuccessMessage('Operation Performed : ' + operation);
+    g_form.addSuccessMessage('OldValue : ' + oldGlideValue);
+    g_form.addSuccessMessage('newValue : ' + newGlideValue);
+
+}