JS to achieve seamless connection of the rotation chart (3) the use of exclusive ideas, the realization of small dots fill color switch



HTML code



JS code



//1. Get element

var arrow-l = document.querySelector(‘.arrow-l’);

var arrow-r = document.querySelector(‘.arrow-r’);

var focus = document.querySelector(‘.focus’);

var focuwidth = focus.offsetWidth;


  arrow-l.style.display = ‘block’;

  arrow-r.style.display = ‘block’;



  arrow-l.style.display = ‘none’;

  arrow-r.style.display =’none’;



//2. Dynamic generation of small dots

var ul = focus.querySelector(‘ul’);

var ol = focus.querySelector(‘ol’);

for(var i = 0;i

      var i = document.createElement(‘li’); 



    //3. At the same time of generating small dots, we use exclusive ideas and bind click events to realize color fill switching

    li.addEventListener (‘Click’, function() {/ / click the exclusive thought of using for loop in the event

    //Clear all current in Li

      for(var i = 0;i

          ol.children[i].className = ”;


        this.className = ‘current’;



        ol.children[0] = ‘current’;



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