ajax结合bootstrap4提交表单

经常用，又经常记不住，mark一下，以后直接抄：

<button onClick='operation("#form_list","#update_all","{:url('/ad/update_all',['lang'=>input('lang')])}");'>提交</button>

function operation(form_id,btn_id,url){
    $.ajax({
        type: 'POST',
        url: url,
        dataType: 'json',
        data: $(form_id).serialize(),
        //发送数据前
        beforeSend: function(){
            // 禁用按钮防止重复提交
            $(btn_id).attr({disabled: "disabled"});
            //弹出modal框
            $('#modal_sm_black_content').html('<img src="loading-white.gif" width="18" height="18" class="mr-2">正在处理，请稍后');
            $("#modal_sm_black").modal("show");
        },
        //成功返回
        success: function(data){
            setTimeout(function(){
                //隐藏modal框
                $(btn_id).removeAttr('disabled');
                $('#modal_sm_black').modal('hide');
                switch(data){
                    case 'success':
                        //操作成功，弹出modal框
                        $('#modal_sm_black_content').html('<i class="fas fa-check-circle mr-2"></i>操作成功');
                        $("#modal_sm_black").modal("show");
                        window.location.reload();
                        break;
                }
            }, 1);
        },
        //处理完成
        complete: function(){
            $(btn_id).removeAttr('disabled');
            $('#modal_sm_black').modal('hide');
        },
        //报错
        error: function(data){
            console.info("error: " + data.responseText);
        }
    });
}

modal框：
<div class="modal" id="modal_sm_black" data-backdrop="static" data-keyboard="false">
    <div class="modal-dialog modal-sm">
        <div class="modal-content bg-opacity">
            <div class="modal-body py-3 text-white text-center text-md" id="modal_sm_black_content"></div>
        </div>
    </div>
</div>