React Nativeで予期しないトークンが発生する

Question

awaitトークンをサポートする最新のbabel/babylonパッケージを取得しようとしましたが、同じエラーが表示されます。

awaitがmap()の機能の中にあり、元の機能スコープの外にある可能性があります。

構成には何がありますか？

index.js：

async getLocations(locations) { 
     var annotations = locations.map(function(location) { 
      try { 
       let res = await Geocoder.geocodeAddress(location.address); 
       console.log(res); 
       console.log(res[0].position); 
      } 
      catch(err) { 
       console.log(err); 
      } 
      return (
       { 
        latitude: res[0].position.lat, 
        longitude: res[0].position.lng 
       } 
      ); 
     }); 
} 

コンソール：

transformed 1/2 (50%)[node-haste] Encountered an error while persisting cache: 
> SyntaxError: /Users/user/Developer/ReactProject/index.js: Unexpected token (122:25) 
> 120 |  var annotations = inspections.map(function(inspection) { 
> 121 |  try { 
> > 122 |   let res = await Geocoder.geocodeAddress(address); 
>  |      ^
> 123 | 
> 124 |   console.log(res); 
> 125 |   console.log(res[0].position); 
>  at Parser.pp.raise (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/location.js:22:13) 
>  at Parser.pp.unexpected (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/util.js:89:8) 
>  at Parser.pp.parseAwait (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/expression.js:1082:10) 
>  at Parser.pp.parseExprAtom (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/expression.js:423:25) 
>  at Parser.pp.parseExprSubscripts (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/expression.js:277:19) 
>  at Parser.pp.parseMaybeUnary (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/expression.js:257:19) 
>  at Parser.pp.parseExprOps (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/expression.js:188:19) 
>  at Parser.pp.parseMaybeConditional (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/expression.js:165:19) 
>  at Parser.pp.parseMaybeAssign (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/expression.js:128:19) 
>  at Parser.pp.parseVar (/Users/user/Developer/ReactProject/node_modules/babylon/lib/parser/statement.js:601:24) 

package.json

"dependencies": { 
    "babel": "^6.5.2", 
    "babel-core": "^6.1.2", 
    "babel-plugin-transform-runtime": "^6.1.2", 
    "babel-polyfill": "^6.9.1", 
    "babel-preset-es2015": "^6.1.2", 
    "babel-preset-stage-0": "^6.1.2", 
    "babel-preset-stage-3": "^6.11.0", 
    "babylon": "^6.8.2", 
    "react": "^15.1.0", 
    "react-native": "0.27.2", 
    }, 

.babelrc：

{ 
    "presets": [ "es2015", "stage-3" ] 
} 

Answer 1

awaitがasync宣言する必要があります使用する関数

{ 
    "plugins": ["transform-async-to-generator"] 
} 

https://babeljs.io/docs/plugins/transform-async-to-generator/

Answer 2

、これを試してみてください。

inspections.map(async function(inspection) {