Nodejs using Asyncawait two methods

Async/await uses synchronous methods to write asynchronous code, reducing the difficulty of asynchronous calls to close to 0, and the future will shine. At the moment, however,async/await is still in ES7 's draft because of the standardized caching pace . In order to taste first, the following two methods are tested:

• use the community-provided asyncawait package
• Use Draft ES7

using community-providedAsyncawaitModuleGitAddress

[email protected]: Yortus/asyncawait.git

How to use:

1. installing the node module

a) npm install [email protected] –save

2. To create a sample class Asyncservice.js

varAsync= require(' Asyncawait/async ');
varawait= require(' asyncawait/await ');
varSleep= Async(
functionSleep(timeout) {
return newPromise(function(Resolve, Reject) {
SetTimeout(function() {
Resolve ();
}, timeout);
});
}
);

(Async(
function() {
Console.Log(' Do some thing, '+ NewDate ());
await(Sleep( the));
Console.Log(' Do other things, '+ NewDate ());
}
))();

3. Run Asyncservice.js

a) Node asyncservice.js

b) operation Result:

Do some thing, Wed June 11:09:05 gmt+0800 ( China Standard Time )

Do other things, Wed June 11:09:08 gmt+0800 ( China Standard Time )

Precautions

1. the asyncawait module internally references the Bluebird module .

2. no need to compile to Es5, can be run directly .

UseES7Draft How to use:

1. To install the node module, a series of modules are required:

a)    babel-cli

b)    babel-preset-es2015 "

c)   babel-preset-react ":

d)    babel-preset-stage-3

e)    babel-polyfill

2. To create a sample class Asyncawaitservice.js

Async FunctionSleep(timeout) {
return newPromise(Resolve, reject) = {
SetTimeout(function() {
Resolve ();
}, timeout);
});
}

(Async Function() {
Console.Log(' Do some thing, '+ NewDate ());
awaitSleep( the);
Console.Log(' Do other things, '+ NewDate ());
})();

3. compiling Asyncawaitservice.js

a) Configure Babel

I. Add the Babel node to the Package.json as follows:/ c6>

   "Babel"        " presets "  : [
        "es2015"           "react"          " stage-3 "
     ], 
      "plugins"   : [] 
}  

b) compiling

Babel Asyncawaitservice.js--out-file Asyncawaitservice_es5.js

Or

Babel Asyncawaitservice.js-o Asyncawaitservice_es5.js

c) to mark compiled code

in the Asyncawaitservice_es5.js the script header adds the following code:

require (' Babel-polyfill ')

4. Run Asyncawaitservice_es5.js

a) Node asyncawaitservice_es5.js

b) operation Result:

Do some thing, Wed June 11:54:13 gmt+0800 ( China Standard Time )

Do other things, Wed June 11:54:16 gmt+0800 ( China Standard Time )

Precautions

1. async/awaitcan be run directly by compiling it to Es5 via Babel.

2. Babel compilation related content can refer to Ruan Yi Feng blog http://www.ruanyifeng.com/blog/2016/01/babel.html

Nodejs using Asyncawait two methods