javascript - Show Countdown after button click -

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i have code html

<div id="container">     <a href="#container">show content</a>     <div id="content">i content!</div> </div>

how when click show content echo countdown (12s) before show <div id="content">i content!</div>

give me example work. thanks

edit: example updated show elements when countdown starts , hide them when countdown ends. when user clicks on link, counttoshow function invoked. initialy hidden 'ads' element shown command adselement.style.display = '' (which removes display: none style specified inline). when countdown ends (remainingseconds === 0), hide 'ads' element again setting adselement.style.display = 'none'.

here example using setinterval function possibility specify countdown time.

function counttoshow(timeinseconds) {      var countdownelement = document.getelementbyid('countdown');    var contentelement = document.getelementbyid('content');    var adselement = document.getelementbyid('ads');    var remainingseconds = timeinseconds;      adselement.style.display = '';    countdownelement.innerhtml = remainingseconds;      var interval = setinterval(function() {        countdownelement.innerhtml = --remainingseconds;        if (remainingseconds === 0) {        clearinterval(interval);        contentelement.style.display = '';        adselement.style.display = 'none';      }      }, 1000);  }
<div id="container">    <a href="#container" onclick="counttoshow(12)">show content</a>    <div id="ads" style="display: none">      <div id="countdown"></div>      <div>ads</div>    </div>    <div id="content" style="display: none">i content!</div>  </div>


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