<div id="swiper">
 <div class="swiper_div">
  <span class="swiper_span custom_span"></span>
  <span class="swiper_span id_span">用户的UID</span>
 </div>
</div>

#swiper{
 position: absolute;
 width: 100%;
 background-color: red;
 z-index: 10000;
 top:0px;
 .swiper_div{
  color: black;
  position: absolute;
  left: 100%;
  white-space: nowrap;
  transition-property: left;
  transition-timing-function: linear;
  .swiper_span{
  font-size: 16px;
  color: black;
  opacity: 1; // 不透明度，范围是0-1
  }
 }
}

const WATER_MARK = {
 VERTICAL_AXIS: 200, // 垂直坐标，单位px
 FONT_SIZE: 16, // 文字字体大小，单位px
 FONT_COLOR: '#ffffff', // 文字颜色
 FONT_OPACITY: 1, // 文字不透明度，范围是 0-1，1为完全不透明
 FONT_BACKGROUND: '', // 文字底色
 SPEED: 200, // 跑马灯速度，单位px/s
 TIME_STAMP: 6, // 文字显示间隔时间，单位s
 TEXT_CONTENT: '', // 自定义文字内容
 };

let $swiper = $('#swiper');
 let $swiperDiv = $(".swiper_div");
 let $swiperSpan = $(".swiper_span");
 let $customSpan = $(".custom_span");
 let $idSpan = $(".id_span");
 
function waterMark() {
 // 不能在此处提前获取id为swiper的div的宽度，获取的比实际要大，目前不知道什么原因。
 // let swiperWidth = $swiper[0].offsetWidth;
 let swiperDivWidth = $swiperDiv[0].offsetWidth;
 
 let verticalAxis = WATER_MARK.VERTICAL_AXIS;
 let fontSize = WATER_MARK.FONT_SIZE;
 let fontColor = WATER_MARK.FONT_COLOR;
 let fontOpacity = WATER_MARK.FONT_OPACITY;
 let fontBackground = WATER_MARK.FONT_BACKGROUND;
 let speed = WATER_MARK.SPEED;
 let timeStamp = WATER_MARK.TIME_STAMP;
 let textContent = WATER_MARK.TEXT_CONTENT;
 
 $swiper.css('top',verticalAxis+'px');
 $swiperSpan.css('font-size',fontSize+'px');
 $swiperSpan.css('color',fontColor);
 $swiperSpan.css('opacity',fontOpacity);
 $swiperDiv.css('background-color',fontBackground);
 $customSpan.text(textContent);
 
 setTimeout(function () {
  let totalScrollWidth = swiperDivWidth+$swiper[0].offsetWidth;
  let durationTime = totalScrollWidth/speed; // 3.135s
  $swiperDiv.css("transition-duration",durationTime+"s");
  $swiperDiv.css("left","-"+swiperDivWidth+"px");
  setInterval(function () {
  if($swiperDiv.css('left') === '-'+swiperDivWidth+'px'){
   $swiperDiv.css("left","100%");
   $swiperDiv.css("transition-property",'null');
  }else{
   $swiperDiv.css("transition-property",'left');
   $swiperDiv.css("left","-"+swiperDivWidth+"px");
   $swiperDiv.css("transition-delay",timeStamp+'s');
  }
  },1000);
 },1000);
 }
 waterMark();

let durationTime = 5000 ; // 过渡时间，毫秒制，与过度时间保持一致时间
 let jiange = 6000 ; // 自定义间隔时间
 let jisuan = 1000; //设置计算时间的精度
 setTimeout(function () {
 //开始执行滚动
 $swiperDiv.css("left","-"+swiperDivWidth+"px");
 setInterval(function () {
 sumeTime = sumeTime + jisuan; //所加值与 setInterval 设置时间一致
 if((sumeTime >= durationTime) && (sumeTime < (jiange + durationTime))){ 
 //刚好滚动完到最右侧
 $swiperDiv.css("left","100%");
 $swiperDiv.css("transition-property",'null');
 }else if(sumeTime >=(jiange + durationTime)){
 // console.log("间隔时间到啦开始下次执行了啊******");
 $swiperDiv.css("transition-property",'left');
 $swiperDiv.css("left","-"+swiperDivWidth+"px");
 sumeTime = 0;
 }
 },jisuan);
 },1000);