How to let Axios (a javascript restful request library) not send some arguments/keys for an object?
{
    name: "yingshaoxo",
    love: undefined
}
the love won’t send out, the payload will become:
{
    name: "yingshaoxo",
} 
{
    name: "yingshaoxo",
    love: undefined
}
the love won’t send out, the payload will become:
{
    name: "yingshaoxo",
}