Unexpected character '#'

[zx493734247]

./node_modules/@heyputer/kv.js/XMap.js 10:4
Module parse failed: Unexpected character '#' (10:4)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
|
| class XMap {

#pool;

|
| /**

this is my tsconfig.json
{
"compilerOptions": {
"target": "ES2019",
"module": "esnext",
"strict": true,
"allowJs": true,
"strictNullChecks": false,
"noImplicitAny": false,
"skipLibCheck": true,
"skipDefaultLibCheck": true,
"jsx": "preserve",
"moduleResolution": "node",
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"allowSyntheticDefaultImports": true,
"strictPropertyInitialization": false,
"sourceMap": true,
"baseUrl": ".",
"types": ["webpack-env"],
"paths": {
"@/": ["src/"]
},
"resolveJsonModule": true
},
"include": ["src//*.ts", "src//.tsx", "src/**/.vue", "tests//*.ts", "tests//*.tsx"],
"exclude": ["node_modules"]
}