fix negative tw class names being reported as vendor prefixed selector (#371)

closes #348

Author: bartveneman

src/__fixtures__/gazelle-20231008.json

@@ -3,7 +3,7 @@
     "sourceLinesOfCode": 29224,
     "linesOfCode": 45124,
     "size": 846671,
-    "complexity": 97705,
+    "complexity": 97704,
     "comments": {
       "total": 4,
       "size": 1678
@@ -76220,16 +76220,16 @@
     "complexity": {
       "min": 1,
       "max": 19,
-      "mean": 3.9728714915986107,
+      "mean": 3.972777621327326,
       "mode": 1,
       "median": 3,
       "range": 18,
-      "sum": 42323,
+      "sum": 42322,
       "total": 10653,
       "totalUnique": 19,
       "unique": {
-        "1": 2665,
-        "2": 1132,
+        "1": 2666,
+        "2": 1131,
         "3": 2178,
         "4": 944,
         "5": 1242,
@@ -86734,7 +86734,7 @@
         2,
         1,
         1,
-        2,
+        1,
         1,
         1,
         1,

src/selectors/complexity.test.js

@@ -49,16 +49,20 @@ Complexity('calculates complexity', () => {
 
 Complexity('calculates complexity with vendor prefixes', () => {
   const actual = analyze(`
-  no-prefix,
-  fake-webkit,
   input[type=text]::-webkit-input-placeholder,
   ::-webkit-scrollbar,
   .site-header .main-nav:hover>ul>li:nth-child(1) svg,
   :-moz-any(header, footer) {}
+
+  /* not vendor prefixed */
+  no-prefix,
+  fake-webkit,
+  .-mt-px,
+  .-space-x-1 {}
   `).selectors.complexity
 
   assert.equal(actual.unique, {
-    '1': 2,
+    '1': 4,
     '5': 1,
     '2': 1,
     '12': 1,

src/selectors/utils.js

@@ -116,9 +116,7 @@ export function getComplexity(selector) {
 
     complexity++
 
-    if (node.type === IdSelector
-      || node.type === ClassSelector
-      || node.type === PseudoElementSelector
+    if (node.type === PseudoElementSelector
       || node.type === TypeSelector
       || node.type === PseudoClassSelector
     ) {