fix: apply latest Volar.js version to docs in "Guides - Your First Volar Language Server"

[tsukuha]

About

Thanks for your watching.
I found to fix point in the doc packages/server/src/languagePlugin.ts existing on first-server.mdx and so on aren't applied
latest Volar.js version.

Reproduction

• package.json

{
  "name": "languge-tools-startup",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "languge-tools-startup": "link:",
    "typescript": "^5.7.2"
  }
}

• tsconfig.base.json

{
  "compilerOptions": {
    "module": "nodenext"
  }
}

• packages/server/package.json

{
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "bin": {
    "html-language-server": "./bin/html1-language-server.js"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@volar/language-core": "^2.4.11",
    "@volar/language-server": "^2.4.11",
    "@volar/language-service": "^2.4.11",
    "volar-service-css": "^0.0.62",
    "volar-service-html": "^0.0.62",
    "vscode-html-languageservice": "^5.3.1",
    "vscode-uri": "^3.0.8"
  }
}

• packages/server/tsconfig.json

{
  "extends": "../../tsconfig.base.json",
  "compilerOptions": {
    "outDir": "out",
    "rootDir": "src",
  },
  "include": ["src"],
}

code	error1	error2

Proposal to fix

• packages/server/src/languagePlugin.ts

+import type { LanguagePlugin, VirtualCode, CodeMapping } from "@volar/language-core";
-import type { LanguagePlugin, VirtualCode } from "@volar/language-core";
import type { URI } from "vscode-uri";
import type * as ts from 'typescript';

export const language = {
  getLanguageId(uri) {
    if (uri.path.endsWith('.html1')) {
      return 'html1';
    }
  },
+ createVirtualCode(scriptId, languageId, snapshot, ctx) {
- createVirtualCode(uri, languageId, snapshot) {
    if (languageId === "html1") {
      return new Html1Code(snapshot);
    }
  },
+ updateVirtualCode(scriptId, virtualCode, newSnapshot, ctx) {
- updateVirtualCode(uri, languageCode, snapshot) {
+  virtualCode.snapshot = newSnapshot;
-  languageCode.update(snapshot);
+  return virtualCode;
-  return languageCode;
  },
} satisfies LanguagePlugin<URI>;

export class Html1Code implements VirtualCode {
  id = "root";
  languageId = "html1";
  embeddedCodes: VirtualCode[] = [];
+ mappings: CodeMapping[] = [];

  constructor(public snapshot: ts.IScriptSnapshot) {
    this.onSnapshotUpdated();
  }

  public update(newSnapshot: ts.IScriptSnapshot) {
    this.snapshot = newSnapshot;
    this.onSnapshotUpdated();
  }

  public onSnapshotUpdated() {
    // Do something with the snapshot
  }
}