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：

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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：