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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ## Reac的核心概念之一 ![](https://box.kancloud.cn/eba6e1b4060e3551b094b021bae81f43_701x414.png) ### tree diff >[danger]新舊兩顆DOM樹,逐層對比的過程,就是Tree Diff,當整顆DOM逐層對比完畢,則所有按需新的元素,必然能被找到,這也是頁面是否更新的本質 ### component diff >[success] 在進行Tree Diff時,組件級別的對比,叫做component Diff,如果對比前后,組件的類型相同,則暫時認為組件不需要被更新,如果對比前后,組件類型不同,則需要移除就組件,創建新組件,并追加到頁面上 ### element diff >[info] 在進行組件對比的時候,如果兩個組件類型相同,則需要進行元素級別的對比,這叫做ELement Diff
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