<a href='#' class='show-some'>
  Show 1
  <div class='block'>Block</div>
</a><br>
<a href='#' class='show-some'>
  Show 2
  <div class='block'>Block</div>
</a><br>
<a href='#' class='show-some'>
  Show 3
  <div class='block'>Block</div>
</a><br>
$(".show-some").click(function(){
        $(this).children(".block").html("Changed");
    });

External CSS

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External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js