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vue+element多选表格在触发select-all的时候怎么获取取消选中的行?

element中多选表格使用select-all方法,想获取取消选中时的行数据,但是API的参数只提供了selection,即选中的行,取消的时候selection就变为空了 这个时候没办法知道取消行

image.png
我想要获取取消选中的那些值 应该要怎么办


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再加个select或者selection-change事件呗


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