refactor: improve code clarity by adding JS comment syntax in loaders and removing default file name constant

Author: YieldRay

src/loader.ts

@@ -10,7 +10,7 @@ export type Loader = (sourceUrl: string, sourceCode: string) => Awaitable<string
 
 export const cssLoader: Loader = (sourceUrl, _sourceCode) => {
   // Note: _sourceCode is empty string
-  const code = `\
+  const code = /*js*/ `\
 const link = document.createElement("link");
 link.rel = "stylesheet";
 link.href = ${JSON.stringify(sourceUrl)};
@@ -28,7 +28,7 @@ export const cssModuleLoader: Loader = (sourceUrl, sourceCode) => {
 
   const { map, css } = cssToModule(sourceCode, prefix);
 
-  const code = `\
+  const code = /*js*/ `\
 const style = document.createElement("style");
 style.textContent = ${JSON.stringify(css)};
 document.head.appendChild(style);

src/ts.ts

@@ -1,9 +1,8 @@
 import ts from "typescript";
 import { ModuleTSXError } from "./error.ts";
 
-const FILE_NAME = "temp.tsx";
 
-export function createSourceFile(code: string, fileName = FILE_NAME) {
+export function createSourceFile(code: string, fileName :string) {
   try {
     const sourceFile = ts.createSourceFile(fileName, code, ts.ScriptTarget.Latest, true, ts.ScriptKind.TSX);
     return sourceFile;