element UI设置dialog在视图居中显示，css设置dialog样式

element设置dialog在视图居中显示

.el-dialog {
  display: flex;
  flex-direction: column;
  margin: 0 !important;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-height: calc(100% - 30px);
  max-width: calc(100% - 30px);
}

.el-dialog .el-dialog__body {
  flex: 1;
  overflow: auto;
}