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README.md 904B

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  1. # util.promisify
  2. Polyfill for util.promisify in node versions < v8
  3. node v8.0.0 added support for a built-in `util.promisify`: https://github.com/nodejs/node/pull/12442/
  4. This package provides the built-in `util.promisify` in node v8.0.0 and later, and a replacement in other environments.
  5. ## Usage
  6. **Direct**
  7. ```js
  8. const promisify = require('util.promisify');
  9. // Use `promisify` just like the built-in method on `util`
  10. ```
  11. **Shim**
  12. ```js
  13. require('util.promisify/shim')();
  14. // `util.promisify` is now defined
  15. const util = require('util');
  16. // Use `util.promisify`
  17. ```
  18. Note: this package requires a native ES5 environment, and for `Promise` to be globally available. It will throw upon requiring it if these are not present.
  19. ## Promisifying modules
  20. If you want to promisify a whole module, like the `fs` module, you can use [`util.promisify-all`](https://www.npmjs.com/package/util.promisify-all).