feat: add support for <svelte:document> (#312)

Author: ota-meshi

.changeset/friendly-moles-appear.md

@@ -0,0 +1,5 @@
+---
+"svelte-eslint-parser": minor
+---
+
+feat: add support for `<svelte:document>`

package.json

@@ -97,7 +97,7 @@
     "prettier-plugin-svelte": "^2.5.0",
     "semver": "^7.3.5",
     "string-replace-loader": "^3.0.3",
-    "svelte": "^3.46.1",
+    "svelte": "^3.57.0",
     "typescript": "~5.0.0",
     "vue-eslint-parser": "^9.0.0"
   },

src/parser/converts/element.ts

@@ -166,6 +166,10 @@ export function* convertChildren(
       yield convertConstTag(child, parent, ctx);
       continue;
     }
+    if (child.type === "Document") {
+      yield convertDocumentElement(child, parent, ctx);
+      continue;
+    }
 
     throw new Error(`Unknown type:${(child as any).type}`);
   }
@@ -328,6 +332,7 @@ function convertSpecialElement(
     | SvAST.InlineComponent
     | SvAST.Element
     | SvAST.Window
+    | SvAST.Document
     | SvAST.Body
     | SvAST.Head
     | SvAST.Options
@@ -590,6 +595,15 @@ function convertWindowElement(
   return convertSpecialElement(node, parent, ctx);
 }
 
+/** Convert for document element. e.g. <svelte:document> */
+function convertDocumentElement(
+  node: SvAST.Document,
+  parent: SvelteSpecialElement["parent"],
+  ctx: Context
+): SvelteSpecialElement {
+  return convertSpecialElement(node, parent, ctx);
+}
+
 /** Convert for body element. e.g. <svelte:body> */
 function convertBodyElement(
   node: SvAST.Body,

src/parser/svelte-ast-types.ts

@@ -20,6 +20,7 @@ export declare type TemplateNode =
   | Element
   | InlineComponent
   | Window
+  | Document
   | Body
   | Head
   | Title
@@ -134,6 +135,12 @@ export interface Window extends BaseNode {
   children: TemplateNode[];
   attributes: AttributeOrDirective[];
 }
+export interface Document extends BaseNode {
+  type: "Document";
+  name: "svelte:document";
+  children: TemplateNode[];
+  attributes: AttributeOrDirective[];
+}
 export interface Body extends BaseNode {
   type: "Body";
   name: "svelte:body";