javascript - Animation to show / hide script using css -


i want add fade in / fade out effect hidden block (id = "help"). how can animate block using pure css? also, want animate link (id = "show) after clicking. please , give me examples.

see code:

    var showelem = document.getelementbyid("show");      var hideelem = document.getelementbyid("hide");      var helpdiv = document.getelementbyid("help");        helpdiv.style.display = 'none';      hideelem.style.visibility = 'hidden';        showelem.onclick = function() {        showelem.style.visibility = 'hidden';        hideelem.style.visibility = 'visible';        helpdiv.style.display = 'block';      };        hideelem .onclick = function() {        hideelem.style.visibility = 'hidden';        showelem.style.visibility = 'visible';        helpdiv.style.display = 'none';      };
div#help {       border: 1px solid black;      height: 200px;      width: 300px;      padding: 10px;      margin-top: 10px;    }
<!doctype html>  <html>  <head>  <meta charset=utf-8 />  <title>js bin</title>    </head>  <body>    <a href="#" id="show">show</a>    <a href="#" id="hide">hide</a>    <div id="help"></div>  </body>  </html>

try this:

$(document).ready(function(){    $("#show").click(function(){      $('.help').addclass('sh');      $(this).css('opacity',0)      $("#hide").css('opacity',1)    })      $("#hide").click(function(){      $('.help').removeclass('sh');       $(this).css('opacity',0)      $("#show").css('opacity',1)    })  })
#hide, #show, .help {      transition: 1s;  }  .help {       border: 1px solid black;      height: 200px;      width: 300px;      padding: 10px;      margin-top: 10px;      opacity: 0;    }      #hide {     opacity: 0;    }     .sh {      opacity: 1;   }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>   <a href="#" id="show">show</a>  <a href="#" id="hide">hide</a>  <div class="help" class="sh"></div>


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