node7 async-await 语法上还不支持

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node7正式发布了，所以想试下比较爽的async-await，毕竟不喜欢使用babel。于是...

语法上还没有支持async await

test.js

async function test() {
    return 'hello async-await';
}

test().then(function(val) {console.log(val)}).catch(function(err) {console.log(err)});

执行

node test.js

竟然得到了

async function test() {}
      ^^^^^^^^
SyntaxError: Unexpected token function
    at Object.exports.runInThisContext (vm.js:76:16)
    at Module._compile (module.js:545:28)
    at Object.Module._extensions..js (module.js:582:10)
    at Module.load (module.js:490:32)
    at tryModuleLoad (module.js:449:12)
    at Function.Module._load (module.js:441:3)
    at Module.runMain (module.js:607:10)
    at run (bootstrap_node.js:382:7)
    at startup (bootstrap_node.js:137:9)
    at bootstrap_node.js:497:3

说明node7还没有在语法上直接支持async await，如果想要使用还是要加上参数

node --hamony-asyc-await test.js

啥子时候呢

Node.js v8, the next stable version containing the V8 version that enables async/await operations will be released in April 2017. Till that time you can still experiment with it using the unstable Node.js v7 branch.

转载于:https://my.oschina.net/u/1249401/blog/779066