我的需求：多個頁面頂部共用一個組件topBar，topBar內有"首頁"按鈕，點擊可返回到首頁，想做成當前頁為首頁時，不顯示這個按鈕，其他則顯示。
原topBar:
其他組件:
發現報錯 : The data property "isHome" is already declared as a prop. Use prop default value instead.
解決方法: 去掉子組件topBar的data里的isHome即可
vue——子組件報錯：The data property "isHome" is already declared as a prop. Use prop default value instead.
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