Doc: checking JavaScript syntax

Change-Id: Iad66cc619ed1027389569dea9bfd72bea6399af6
Reviewed-by: Christian Kamm <christian.d.kamm@nokia.com>

doc/src/editors/creator-editors.qdoc

@@ -346,6 +346,41 @@
 
     \endlist
 
+    \section1 Checking JavaScript Syntax
+
+    You can run static checks on JavaScript to find common problems, such as:
+
+    \list
+
+        \o  Duplicate or conflicting variable, function, and formal parameter
+            declarations
+
+        \o  Variables and functions that are used before they are declared
+
+        \o  Possibly unsafe uses of the == or != operators
+
+        \o  Comma expressions, except in \c for statements
+
+        \o  Expression statements, except function or method calls, assignments,
+            or \c delete
+
+        \o  Assignments within conditions (such as, \c {if (a = b)})
+
+        \o  Case blocks within a switch that do not end with a return, break,
+            continue, or throw and that are not empty
+
+        \o  Nested block statements
+
+        \o  \c with statements
+
+        \o  \c void expressions
+
+    \endlist
+
+    To run the checks, select \gui {Tools > QML/JS > Run Checks} or press
+    \key Ctrl+Shift+C. The results are shown in the \gui {QML Analysis}
+    filter of the \gui {Issues} output pane.
+
 */