adds common js pretty symbols for rjsx-mode

modules/lang/javascript/config.el

@@ -82,6 +82,22 @@
       ;; jshint doesn't know how to deal with jsx
       (push 'javascript-jshint flycheck-disabled-checkers)))
 
+  (set-pretty-symbols! 'rjsx-mode
+    ;; Functional
+    :def "function"
+    :lambda "() =>"
+    :composition "compose"
+    ;; Types
+    :null "null"
+    :true "true" :false "false"
+    ;; Flow
+    :not "!"
+    :and "&&" :or "||"
+    :for "for"
+    :return "return"
+    ;; Other
+    :yield "import")
+
   ;; `rjsx-electric-gt' relies on js2's parser to tell it when the cursor is in
   ;; a self-closing tag, so that it can insert a matching ending tag at point.
   ;; However, the parser doesn't run immediately, so a fast typist can outrun