javascript - How would you implement a timer for the slider here? -


with of internet, came this: http://codepen.io/birjolaxew/pen/yjylyz

the author of posts fixed syntax errors :);

but came across problem, how can implement setinterval here? each second or radio checked , next image proceeds. i've googled few videos didn't aid me much. perhaps seeing code specific problem me in understanding!

code:      <!-- images --> <div class="fb featuredslider_container">   <div id="images">     <img src="https://s-media-cache-ak0.pinimg.com/736x/a4/11/3e/a4113ec2da852f2eaa65af72e96decb6.jpg" />     <img src="http://cdn.arstechnica.net/wp-content/uploads/2015/09/googleplus-logos-02-980x980.png" />     <img src="http://img05.deviantart.net/6b35/i/2013/015/7/9/the_white_dog_sophie_2_by_thecakemassacre-d5rko7g.jpg" />   </div>   <!-- radio sutff -->   <div class="featuredradiowrap">     <input checked class="featuredradio" id="featureditemslider1" name="itemslider" type="radio">     <label for="featureditemslider1"></label>     <input class="featuredradio" id="featureditemslider2" name="itemslider" type="radio">     <label for="featureditemslider2"></label>     <input class="featuredradio" id="featureditemslider3" name="itemslider" type="radio">     <label for="featureditemslider3"></label>   </div> </div>  css:      .featuredslider_container{   position: relative;   width: 500px;   height: 250px;   margin: 0 auto 32px;   overflow: initial;  /* change overflow:hidden if want see final product */   box-shadow: 0 0 0 2px #bfb198; } #images {   font-size: 0;   /*remove white space */   width: 1500px;   height: 100%;   animation: move-images 8s infinite;   position: absolute;   left: 0;   top: 0; }  #images img {   width: 500px;   height: 100%; }   /* radio sutff */  input[type="radio"] {   display: none; }  .featuredradiowrap {   position: absolute;   bottom: 0.8rem;   left: 50%;   transform: translatex(-50%); }  .featuredradio + label:before {   content: "";   display: inline-block;   margin-right: 2px;   border-radius: 30px;   background: #00a0ff;   height: 17px;   width: 17px; }  input[type="radio"]:checked + label:before {   background: orange; }  javascript      var featuredradio = document.getelementsbyclassname("featuredradiowrap")[0]; var images = document.getelementbyid("images");  function leftanimation() {   if (document.getelementbyid("featureditemslider1").checked == true) {     images.style.transition = "left 2s linear 0s";     images.style.left = "0";   } if (document.getelementbyid("featureditemslider2").checked == true) {     images.style.transition = "left 2s linear 0s";     images.style.left = "-500px";   }   if (document.getelementbyid("featureditemslider3").checked == true) {     images.style.transition = "left 2s linear 0s";     images.style.left = "-1000px";   } } featuredradio.addeventlistener("click", leftanimation); 

try one. targeting wrapper, not inputs.

var featuredradio = document.getelementsbyclassname("featuredradio"); var images = document.getelementbyid("images");  function leftanimation() {   if (featuredradio[0].checked == true) {     images.style.transition = "left 2s linear 0s";     images.style.left = "0";   } else if (featuredradio[1].checked == true) {     images.style.transition = "left 2s linear 0s";     images.style.left = "-500px";   }   else if (featuredradio[2].checked == true) {     images.style.transition = "left 2s linear 0s";     images.style.left = "-1000px";   } } featuredradio.addeventlistener("click", leftanimation);