在安装aws-sdk之前，我的项目一直运行良好(链接：https://www.npmjs.com/package/aws-sdk(。
我试过谷歌。。但无法解决这个问题。。
我得到这个错误：
core.js:1673 ERROR Error: Uncaught (in promise): ReferenceError: global is not defined
ReferenceError: global is not defined
at Object../node_modules/buffer/index.js (index.js:43)
at __webpack_require__ (bootstrap:81)
at Object../node_modules/aws-sdk/lib/browserHashUtils.js (browserHashUtils.js:1)
at __webpack_require__ (bootstrap:81)
at Object../node_modules/aws-sdk/lib/browserHmac.js (browserHmac.js:1)
at __webpack_require__ (bootstrap:81)
at Object../node_modules/aws-sdk/lib/browserCryptoLib.js (browserCryptoLib.js:1)
at __webpack_require__ (bootstrap:81)
at Object../node_modules/aws-sdk/lib/browser_loader.js (browser_loader.js:4)
at __webpack_require__ (bootstrap:81)
at resolvePromise (zone.js:814)
at resolvePromise (zone.js:771)
at zone.js:873
at ZoneDelegate../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)
at Object.onInvokeTask (core.js:3811)
at ZoneDelegate../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)
at Zone../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)
at drainMicroTaskQueue (zone.js:595)
请通过添加更新/src/polyfills.ts
// aws-sdk requires global to exist
(window as any).global = window;