Autoprefixer applies control comment to whole block, not to next rules.

多行文本省略号如下写，会报Warning:Autoprefixer applies control comment to whole block, not to next rules.

.wrap{
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    /* autoprefixer: off */
    -webkit-box-orient: vertical;
    /* autoprefixer: on */
}

此时需修改成

 /* autoprefixer: ignore next */
            -webkit-box-orient: vertical;

意思是让单行(而不是块)的规则需要用 autoprefixer: ignore next