[SignalingServer] Optimize dependent modules
[platform/framework/web/wrtjs.git] / device_home / node_modules / p-try / readme.md
1 # p-try [![Build Status](https://travis-ci.org/sindresorhus/p-try.svg?branch=master)](https://travis-ci.org/sindresorhus/p-try)
2
3 > Start a promise chain
4
5 [How is it useful?](http://cryto.net/~joepie91/blog/2016/05/11/what-is-promise-try-and-why-does-it-matter/)
6
7
8 ## Install
9
10 ```
11 $ npm install p-try
12 ```
13
14
15 ## Usage
16
17 ```js
18 const pTry = require('p-try');
19
20 (async () => {
21         try {
22                 const value = await pTry(() => {
23                         return synchronousFunctionThatMightThrow();
24                 });
25                 console.log(value);
26         } catch (error) {
27                 console.error(error);
28         }
29 })();
30 ```
31
32
33 ## API
34
35 ### pTry(fn, ...arguments)
36
37 Returns a `Promise` resolved with the value of calling `fn(...arguments)`. If the function throws an error, the returned `Promise` will be rejected with that error.
38
39 Support for passing arguments on to the `fn` is provided in order to be able to avoid creating unnecessary closures. You probably don't need this optimization unless you're pushing a *lot* of functions.
40
41 #### fn
42
43 The function to run to start the promise chain.
44
45 #### arguments
46
47 Arguments to pass to `fn`.
48
49
50 ## Related
51
52 - [p-finally](https://github.com/sindresorhus/p-finally) - `Promise#finally()` ponyfill - Invoked when the promise is settled regardless of outcome
53 - [More…](https://github.com/sindresorhus/promise-fun)
54
55
56 ## License
57
58 MIT © [Sindre Sorhus](https://sindresorhus.com)