# isWebWorker > Check if the runtime is a [web worker][mdn-web-workers-api].

## Usage ```javascript var IS_WEB_WORKER = require( '@stdlib/assert/is-web-worker' ); ``` #### IS_WEB_WORKER `Boolean` indicating if the runtime is a [web worker][mdn-web-workers-api]. ```javascript var bool = IS_WEB_WORKER; // returns ```

## Notes - In order to determine whether the runtime is a [web worker][mdn-web-workers-api], the implementation must resolve the global scope, thus requiring function generation. The use of function generation may be problematic in browser contexts enforcing a strict [content security policy][mdn-csp] (CSP).

## Examples ```javascript var IS_WEB_WORKER = require( '@stdlib/assert/is-web-worker' ); console.log( IS_WEB_WORKER ); // => ```

[mdn-web-workers-api]: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API [mdn-csp]: https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP