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更新 'README.md'

Caner 1 year ago
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dfd5456849
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      README.md

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README.md

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 # smallExeCanvas
 
-小程序canvas画图demo
+小程序canvas画图demo
+
+## 功能
+1. 层级覆盖
+2. 撤销
+3. 清空
+4. 保存