编译vue项目的时候出现一个warning警告

start value has mixed support, consider using flex-start instead

处理方法

div {
    display: flex;
    justify-content: start;
}

将start替换成flex-start 即可

div {
    display: flex;
    justify-content: flex-start;
}

参考
处理“start value has mixed support, consider using flex-start instead”编译警告