[@vue/compiler-sfc] the ＞＞＞ and /deep/ combinators have been deprecated. Use :deep() instead.

[@vue/compiler-sfc] the >>> and /deep/ combinators have been deprecated. Use :deep() instead.[@vue/compiler-sfc] ::v-deep usage as a combinator has been deprecated. Use :deep() instead.

这是个警告，意思是你原先用的深度选择器 deep 是已经被遗弃的写法，最好用新的写法来代替。如图：

深度选择器多用在组件或css样式的选择器嵌套较深的场景中，比如略微调整ElementUI的组件的样式的时候

虽说这个警告不会影响程序正常运行，但终究是个隐患，还是用新写法为好，如

旧的写法：/deep/ .el-input {

width: 110px;

}

新的写法：deep(.el-input) {

width: 110px;

}