flow like the river

VISUALIZACION/node_modules/falafel/example/keyword.js

@@ -0,0 +1,16 @@
+var falafel = require('../');
+var src = 'console.log(beep "boop", "BOOP");';
+
+function isKeyword (id) {
+    if (id === 'beep') return true;
+}
+
+var output = falafel(src, { isKeyword: isKeyword }, function (node) {
+    if (node.type === 'UnaryExpression'
+    && node.operator === 'beep') {
+        node.update(
+            'String(' + node.argument.source() + ').toUpperCase()'
+        );
+    }
+});
+console.log(output);