Error TS2304: The identifier 'btoa' could not be located

When using the btoa method to hash usernames and passwords, everything seems to be working fine. However, I am encountering this error in my TypeScript errors within WebStorm. How can I resolve this issue?

JavaScript code

let base64hash = btoa(user.username+ ':' + user.key);

tsconfig.json

/* tsconfig.json */
{
  "compileOnSave": false,
  "compilerOptions": {
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "es2016"
    ]
  }
}
typescriptwebstorm

Answer №1

The reason why the compiler is unable to locate the definition for btoa() is due to the absence of all the necessary libraries being included.

When utilizing the --lib compiler option, it is essential to incorporate all the default libraries that are included when this option is not used.
In your particular scenario, what is lacking is the DOM library, thus it should be:

/* tsconfig.json */
{
    ...
    "compilerOptions": {
        ...
        "lib": [
            "es2016", "DOM"
        ]
    }
}

This is because the definition for btoa can be found in lib.dom.d.ts.

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