WeChat applet implements text scrolling

<view>After displaying, display again:</view>
<view class="example">
 <view class="box">
 <view class="text" style="{{orientation}}:{{marqueeDistance}}px;font-size: {{size}}px;">
  {{text}}
 </view>
 </view>
</view>
<view>When the white border appears, it will display:</view>
<view class="example">
 <view class="box">
 <view class="text" style="{{orientation}}:{{marqueeDistance2}}px;font-size: {{size}}px;">
  <text>{{text}}</text>
  <text wx:if="{{marquee2copy_status}}" style="margin-left:{{marquee2_margin}}px;">{{text}}</text>
 </view>
 </view>
</view>

.example {
 display: block;
 width: 100%;
 height: 100rpx;
}

.box {
 width: 100%;
 position: relative;
}

.text {
 white-space: nowrap;
 position: absolute;
 top: 0;
}

Page({


 data: {
 text: 'Scrolling text 1234567890abcdefghijklmnopqrstuvmxyz',
 marqueePace: 1, //Scrolling speed marqueeDistance: 0, //Initial scrolling distance marqueeDistance2: 0,
 marquee2copy_status: false,
 marquee2_margin: 60,
 size: 14,
 orientation: 'left', //Scroll direction interval: 20 // Time interval},
 onShow: function() {
 // Page display var vm = this;
 var length = vm.data.text.length * vm.data.size; //text length var windowWidth = wx.getSystemInfoSync().windowWidth; //screen width vm.setData({
  length: length,
  windowWidth: windowWidth,
  marquee2_margin: length < windowWidth ? windowWidth - length : vm.data.marquee2_margin //When the text length is shorter than the screen length, padding needs to be added});
 vm.run1(); //After scrolling a horizontal line of words, scroll in the original direction vm.run2(); //The first word disappears and then immediately appears from the right },
 run1: function() {
 var vm = this;
 var interval = setInterval(function() {
  if (-vm.data.marqueeDistance < vm.data.length) {
  vm.setData({
   marqueeDistance: vm.data.marqueeDistance - vm.data.marqueePace,
  });
  } else {
  clearInterval(interval);
  vm.setData({
   marqueeDistance: vm.data.windowWidth
  });
  vm.run1();
  }
 }, vm.data.interval);
 },
 run2: function() {
 var vm = this;
 var interval = setInterval(function() {
  if (-vm.data.marqueeDistance2 < vm.data.length) {
  // If the text scrolls to the white edge of marquee2_margin=30px, then display vm.setData({
   marqueeDistance2: vm.data.marqueeDistance2 - vm.data.marqueePace,
   marquee2copy_status: vm.data.length + vm.data.marqueeDistance2 <= vm.data.windowWidth + vm.data.marquee2_margin,
  });
  } else {
  if (-vm.data.marqueeDistance2 >= vm.data.marquee2_margin) { // When the second text scrolls to the leftmost vm.setData({
   marqueeDistance2: vm.data.marquee2_margin // re-roll directly });
   clearInterval(interval);
   vm.run2();
  } else {
   clearInterval(interval);
   vm.setData({
   marqueeDistance2: -vm.data.windowWidth
   });
   vm.run2();
  }
  }
 }, vm.data.interval);
 }


})