You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
904 B
29 lines
904 B
2 years ago
|
# util.promisify
|
||
|
|
Polyfill for util.promisify in node versions < v8
|
||
|
|
|
||
|
|
node v8.0.0 added support for a built-in `util.promisify`: https://github.com/nodejs/node/pull/12442/
|
||
|
|
|
||
|
|
This package provides the built-in `util.promisify` in node v8.0.0 and later, and a replacement in other environments.
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
**Direct**
|
||
|
|
```js
|
||
|
|
const promisify = require('util.promisify');
|
||
|
|
// Use `promisify` just like the built-in method on `util`
|
||
|
|
```
|
||
|
|
|
||
|
|
**Shim**
|
||
|
|
```js
|
||
|
|
require('util.promisify/shim')();
|
||
|
|
// `util.promisify` is now defined
|
||
|
|
const util = require('util');
|
||
|
|
// Use `util.promisify`
|
||
|
|
```
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
## Promisifying modules
|
||
|
|
|
||
|
|
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).
|