el-table改變表頭顏色和table列的寬度自定義

https://blog.csdn.net/qq_41075132/article/details/91445188ui https://blog.csdn.net/yanzisu_congcong/article/details/82220186spa https://blog.csdn.net/Dg_Zing/article/details/87194329（用的這種）.net   Eleme

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