fix: parsing spreads in function call returns (francoismassart#285)

* fix: Parsing spreads in function call returns
* Revert style change

---------

Co-authored-by: Egor Pavlikhin <egor@pavlikhin.com>

Author: egorpavlikhin

lib/util/ast.js

@@ -184,6 +184,9 @@ function extractRangeFromNode(node) {
   if (node.type === 'TextAttribute' && node.name === 'class') {
     return [node.valueSpan.fullStart.offset, node.valueSpan.end.offset];
   }
+  if (node.value === undefined) {
+    return [0,0];
+  }
   switch (node.value.type) {
     case 'JSXExpressionContainer':
       return node.value.expression.range;
@@ -196,6 +199,10 @@ function extractValueFromNode(node) {
   if (node.type === 'TextAttribute' && node.name === 'class') {
     return node.value;
   }
+  if (node.value === undefined) {
+    return node.value;
+  }
+
   switch (node.value.type) {
     case 'JSXExpressionContainer':
       return node.value.expression.value;

tests/lib/rules/classnames-order.js

@@ -281,6 +281,14 @@ ruleTester.run("classnames-order", rule, {
     {
       code: `<div class="py-1\u3000px-2 block">Do not treat full width space as class separator</div>`,
     },
+    {
+      code: `
+        const func = () => ({ a: 12 });
+        <div className={clsx(['text-sm', {
+          ...func()
+        }])}>Spread of a function return inside clsx</div>
+      `,
+    },
   ],
   invalid: [
     {