angular6升级到9后使用ng serve指令报错 Cannot use [chunkhash] or [contenthash] for chunk in '[name].[chunkhash:20].js' (use [hash] instead)

// 需要将angular.json中的 outputHashing 设置为none
"outputHashing": "none",

　　

详情见： https://github.com/angular/angular-cli/issues/10411