CRITICAL: createFile from createVirtualTypeScriptEnvironment does not create a file detectable by it's own updateFile

Page URL: https://github.com/microsoft/TypeScript-Website/blob/v2/packages/typescript-vfs/src/index.ts#L72

Issue: When calling updateFile on a newly created file, an error is thrown, stating Error: Did not find a source file for X. I believe the internal fs mapping does not get updated with the newly created files.

Here's an example:

    import {
        createDefaultMapFromCDN,
        createSystem,
        createVirtualTypeScriptEnvironment
    } from '@typescript/vfs';
    import ts from 'typescript';

    const compilerOpts = {
        target: ts.ScriptTarget.ES2021,
        module: ts.ScriptTarget.ES2020,
        lib: ['es2021', 'es2020', 'dom', 'webworker'],
        esModuleInterop: true
    };

    const fsMap = await createDefaultMapFromCDN(
        compilerOpts,
        ts.version,
        false,
        ts
    );
    const ENTRY_POINT = 'index.ts';
    fsMap.set(ENTRY_POINT, 'Hello World');

    const system = createSystem(fsMap);
    const env = createVirtualTypeScriptEnvironment(
        system,
        [ENTRY_POINT],
        ts,
        compilerOpts
    );

    env.createFile('test.js', 'test')
    env.updateFile('test.js', 'hello world') // throws error

Beginne in packages/typescript-vfs/src/index.ts ungefähr bei Zeile 72 und reproduziere das Beispiel mit createVirtualTypeScriptEnvironment, createFile und updateFile. Verfolge, warum die neu erstellte test.js nicht gefunden wird, und überprüfe anschließend, dass ihre Aktualisierung den gemeldeten Source-File-Fehler nicht mehr auslöst.