用axios呼叫.net core web api引發的Vue Error - Cannot set property of undefined in response
原則上 記住要用箭頭函式寫法 才會承接上下文解析 不要再用function額外定義方式 Ref: Vue - Cannot set property of undefined in response https://stackoverflow.com/questions/62852746/vue-cannot-set-property-of-undefined-in-response