add debug logging

syntax-tree · Dec 19, 2015 · 896d376 · 896d376
1 parent 354a9b7
commit 896d376
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/index.js b/index.js
@@ -3,8 +3,13 @@
 var parseSelector = require('./lib/selector')(),
     select = require('./lib/select');
 
+var debug = require('debug')('unist-util-select');
+
 
 module.exports = function (ast, selector) {
+  debug('Selector: %j', selector);
   selector = parseSelector(selector);
+  debug('AST: %s',
+        JSON.stringify(selector, null, 2).replace(/(^|\n)/g, '\n    '));
   return selector ? select[selector.type](selector, ast) : [];
 };
diff --git a/package.json b/package.json
@@ -40,7 +40,8 @@
     "walk"
   ],
   "dependencies": {
-    "css-selector-parser": "^1.1.0"
+    "css-selector-parser": "^1.1.0",
+    "debug": "^2.2.0"
   },
   "devDependencies": {
     "tape": "^4.2.0"