Fix crash with empty style attr (#159)

* Fix crash with empty style attr

* add boolean attr test and update

Author: ota-meshi

src/rules/require-optimized-style-attribute.ts

@@ -32,7 +32,7 @@ export default createRule("require-optimized-style-attribute", {
         })
       },
       SvelteAttribute(node) {
-        if (node.key.name !== "style") {
+        if (node.key.name !== "style" || !node.value?.length) {
           return
         }
         const root = parseStyleAttributeValue(node, context)

src/utils/css-utils/style-attribute.ts

@@ -32,6 +32,9 @@ export function parseStyleAttributeValue(
     return cache.get(node) || null
   }
   cache.set(node, null)
+  if (!node.value?.length) {
+    return null
+  }
   const startOffset = node.value[0].range[0]
   const sourceCode = context.getSourceCode()
   const cssCode = node.value.map((value) => sourceCode.getText(value)).join("")

tests/fixtures/rules/no-dupe-style-properties/valid/empty01-input.svelte

@@ -0,0 +1,5 @@
+<script>
+</script>
+
+<div style="">...</div>
+<div style>...</div>

tests/fixtures/rules/no-shorthand-style-property-overrides/valid/empty01-input.svelte

@@ -0,0 +1,5 @@
+<script>
+</script>
+
+<div style="">...</div>
+<div style>...</div>

tests/fixtures/rules/prefer-style-directive/valid/empty01-input.svelte

@@ -0,0 +1,5 @@
+<script>
+</script>
+
+<div style="">...</div>
+<div style>...</div>

tests/fixtures/rules/require-optimized-style-attribute/valid/empty01-input.svelte

@@ -0,0 +1,5 @@
+<script>
+</script>
+
+<div style="">...</div>
+<div style>...</div>