简记webpack运行报错 Uncaught TypeError: self.postMessage is not a function

说好2017Fix的还是能重现，可能项目的版本比较旧了，简要记录解决办法

1.错误：

index.js?bed3:67 Uncaught TypeError: self.postMessage is not a function

    at sendMsg (index.js?bed3:67)

    at Object.invalid (index.js?bed3:83)

    at SockJS.onmessage (socket.js?57b2:41)

    at SockJS.EventTarget.dispatchEvent (sockjs.js?3600:170)

    at eval (sockjs.js?3600:887)

    at Array.forEach (<anonymous>)

    at SockJS._transportMessage (sockjs.js?3600:885)

    at WebSocketTransport.EventEmitter.emit (sockjs.js?3600:86)

    at WebSocketTransport.ws.onmessage (sockjs.js?3600:2961)

2. 解决办法：打开文件 node_modules\webpack-dev-server\client\index.js ，找到 67行（或sendMsg方法）补充类型判断条件 && typeof self === 'function'

　如图：

巴特西

简记webpack运行报错 Uncaught TypeError: self.postMessage is not a function

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