안녕하세요 강사님 오류문의드립니다.

tsconfig.json 에 이거 넣어서 해보세요

{
	"compilerOptions": {
		/* Visit https://aka.ms/tsconfig.json to read more about this file */

		/* Projects */
		// "incremental": true,                              /* Enable incremental compilation */
		// "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
		// "tsBuildInfoFile": "./",                          /* Specify the folder for .tsbuildinfo incremental compilation files. */
		// "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects */
		// "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
		// "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */

		/* Language and Environment */
		"target": "es2016" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
		// "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
		// "jsx": "preserve",                                /* Specify what JSX code is generated. */
		"experimentalDecorators": true /* Enable experimental support for TC39 stage 2 draft decorators. */,
		"emitDecoratorMetadata": true /* Emit design-type metadata for decorated declarations in source files. */,
		// "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */
		// "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
		// "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */
		// "reactNamespace": "",                             /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */
		// "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
		// "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */

		/* Modules */
		"module": "commonjs" /* Specify what module code is generated. */,
		// "rootDir": "./",                                  /* Specify the root folder within your source files. */
		// "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
		// "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
		// "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
		// "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
		// "typeRoots": [],                                  /* Specify multiple folders that act like `./node_modules/@types`. */
		// "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
		// "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
		// "resolveJsonModule": true,                        /* Enable importing .json files */
		// "noResolve": true,                                /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */

		/* JavaScript Support */
		// "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */
		// "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
		// "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */

		/* Emit */
		// "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
		// "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
		// "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
		// "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
		// "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */
		// "outDir": "./",                                   /* Specify an output folder for all emitted files. */
		// "removeComments": true,                           /* Disable emitting comments. */
		// "noEmit": true,                                   /* Disable emitting files from a compilation. */
		// "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
		// "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types */
		// "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
		// "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
		// "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
		// "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
		// "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
		// "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
		// "newLine": "crlf",                                /* Set the newline character for emitting files. */
		// "stripInternal": true,                            /* Disable emitting declarations that have `@internal` in their JSDoc comments. */
		// "noEmitHelpers": true,                            /* Disable generating custom helper functions like `__extends` in compiled output. */
		// "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
		// "preserveConstEnums": true,                       /* Disable erasing `const enum` declarations in generated code. */
		// "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
		// "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */

		/* Interop Constraints */
		// "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
		// "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
		"esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */,
		// "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
		"forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,

		/* Type Checking */
		"strict": false /* Enable all strict type-checking options. */,
		// "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied `any` type.. */
		// "strictNullChecks": true,                         /* When type checking, take into account `null` and `undefined`. */
		// "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
		// "strictBindCallApply": true,                      /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */
		"strictPropertyInitialization": false /* Check for class properties that are declared but not set in the constructor. */,
		// "noImplicitThis": true,                           /* Enable error reporting when `this` is given the type `any`. */
		// "useUnknownInCatchVariables": true,               /* Type catch clause variables as 'unknown' instead of 'any'. */
		// "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
		// "noUnusedLocals": true,                           /* Enable error reporting when a local variables aren't read. */
		// "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read */
		// "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
		// "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
		// "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
		// "noUncheckedIndexedAccess": true,                 /* Include 'undefined' in index signature results */
		// "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
		// "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type */
		// "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
		// "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */

		/* Completeness */
		// "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
		"skipLibCheck": true /* Skip type checking all .d.ts files. */
	}
}