Fix bug on typescript (#28)

Author: ota-meshi

src/context/index.ts

@@ -153,12 +153,15 @@ function* extractBlocks(code: string): IterableIterator<{
             const codeRange: [number, number] = [startTagEnd, endTagStart]
 
             const attrRe =
-                // eslint-disable-next-line regexp/no-unused-capturing-group -- maybe bug
-                /(<key>[^\s=]+)(?:=(?:"(<val>[^"]*)"|'(<val>[^"]*)'|(<val>[^\s=]+)))?/giu
+                /(?<key>[^\s=]+)(?:=(?:"(?<val1>[^"]*)"|'(?<val2>[^"]*)'|(?<val3>[^\s=]+)))?/giu
             const attrs: Record<string, string | undefined> = {}
             let attrRes
             while ((attrRes = attrRe.exec(attributes))) {
-                attrs[attrRes.groups!.key] = attrRes.groups!.val
+                attrs[attrRes.groups!.key] =
+                    (attrRes.groups!.val1 ||
+                        attrRes.groups!.val2 ||
+                        attrRes.groups!.val3) ??
+                    null
             }
             yield {
                 code: code.slice(...codeRange),

src/parser/index.ts

@@ -111,7 +111,7 @@ export function parseForESLint(
                 statement = statements[0]
             }
             if (
-                body.startTag.attributes.every(
+                !body.startTag.attributes.some(
                     (attr) =>
                         attr.type === "SvelteAttribute" &&
                         attr.key.name === "context" &&

tests/fixtures/parser/ast/docs/template-syntax/11-element-directives/07-transition-fn/05-ts-input.svelte

@@ -0,0 +1,29 @@
+<script lang="ts">
+	export let visible:boolean = false;
+
+	function typewriter(node:HTMLElement, { speed = 50 }) {
+		const valid = (
+			node.childNodes.length === 1 &&
+			node.childNodes[0].nodeType === Node.TEXT_NODE
+		);
+
+		if (!valid) return {};
+
+		const text = node.textContent!;
+		const duration = text.length * speed;
+
+		return {
+			duration,
+			tick: (t:number, _u:number) => {
+				const i = ~~(text.length * t);
+				node.textContent = text.slice(0, i);
+			}
+		};
+	}
+</script>
+
+{#if visible}
+	<p in:typewriter="{{ speed: 20 }}">
+		The quick brown fox jumps over the lazy dog
+	</p>
+{/if}

tests/fixtures/parser/ast/docs/template-syntax/11-element-directives/07-transition-fn/05-ts-no-unused-vars-result.json

@@ -0,0 +1,8 @@
+[
+  {
+    "ruleId": "no-unused-vars",
+    "code": "_u:number",
+    "line": 17,
+    "column": 21
+  }
+]