new?Vue({//爺爺 el:"#example-2", ????????? components:?{ ????'u-component':??{//兒子 template:?'<div><mini-child?v-bind:display="display"?v-bind:message="message"></mini-child>A?custom?component!</div>', ?? data:{ ?? display:true, ?? message:"Message?in?parent" ?? }, components:{ ?? "mini-child":?{//孫子 template:'<div>一個孫子<p?v-if="display">!!!!</p>{{message}}</div>', props:["display","message"] } ?? } } } })vue.js:435?[Vue?warn]:?The?"data"?option?should?be?a?function?that?returns?a?per-instance?value?in?component?definitions.warn?@?vue.js:435 vue.js:435?[Vue?warn]:?Property?or?method?"display"?is?not?defined?on?the?instance?but?referenced?during?render.?Make?sure?to?declare?reactive?data?properties?in?the?data?option. found?in --->?<UComponent> ???????<Root>warn?@?vue.js:435 vue.js:435?[Vue?warn]:?Property?or?method?"message"?is?not?defined?on?the?instance?but?referenced?during?render.?Make?sure?to?declare?reactive?data?properties?in?the?data?option. found?in --->?<UComponent> ???????<Root>求幫幫，這個是什么問題呢？