javascript - Jquery/JS Show dynamic checkbox input group title if at least one or more are checked and vice versa -


i want show input group title if @ least 1 checkbox checked, , hide title if no checkboxes checked. each group has own title , data-value. there may 5+ input groups.

here codepen: [example code here][1]   [1]: https://codepen.io/anon/pen/jyrqgw 

$(document).ready(function(){      });
.output {    margin-top:45px;  }
<div class="group-block" data-value="1">    <h1 class="group-title" data-value="1">group1</h1>    <input type="checkbox" data-value="1">item1    <input type="checkbox" data-value="1">item2    <input type="checkbox" data-value="1">item3    <input type="checkbox" data-value="1">item4  </div>    <div class="group-block" data-value="2">    <h1 class="group-title" data-value="2">group2</h1>    <input type="checkbox" data-value="2">item1    <input type="checkbox" data-value="2">item2    <input type="checkbox" data-value="2">item3    <input type="checkbox" data-value="2">item4  </div>    <div class="output">here show titles</div>    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

enter code here

at end, i'm not js/jquery trying make work few hours , have feeling go deep there 2 line solution.

thanks help

i looking for?

$(document).ready(function() {   check() }); $("input[type=checkbox]").change(function() {   check() })  function check() {   $(".group-block").each(function() {     $(this).find(".group-title").css("display", $(this).find("input[type=checkbox]:checked").length ? "block" : "none")   }) }

it check if checkbox has been checked on both .ready() , .change() statement, , show or hide title depends on result.

$(document).ready(function() {    check()  });  $("input[type=checkbox]").change(function() {    check()  })    function check() {    $(".group-block").each(function() {      $(this).find(".group-title").css("display", $(this).find("input[type=checkbox]:checked").length ? "block" : "none")    })  }
.output {    margin-top: 45px;  }
<div class="group-block" data-value="1">    <h1 class="group-title" data-value="1">group1</h1>    <input type="checkbox" data-value="1">item1    <input type="checkbox" data-value="1">item2    <input type="checkbox" data-value="1">item3    <input type="checkbox" data-value="1">item4  </div>    <div class="group-block" data-value="2">    <h1 class="group-title" data-value="2">group2</h1>    <input type="checkbox" data-value="2">item1    <input type="checkbox" data-value="2">item2    <input type="checkbox" data-value="2">item3    <input type="checkbox" data-value="2">item4  </div>    <div class="output">here show titles</div>  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

demo 2 coment

$(document).ready(function() {    check()  });  $("input[type=checkbox]").change(function() {    check()  })    function check() {    $(".output").text("");    $(".group-title").hide();      $(".group-block").each(function() {      if ($(this).find("input[type=checkbox]:checked").length)        $(".output").text($(".output").text() + $(this).find(".group-title").text())    })  }
.output {    margin-top: 45px;  }
<div class="group-block" data-value="1">    <h1 class="group-title" data-value="1">group1</h1>    <input type="checkbox" data-value="1">item1    <input type="checkbox" data-value="1">item2    <input type="checkbox" data-value="1">item3    <input type="checkbox" data-value="1">item4  </div>    <div class="group-block" data-value="2">    <h1 class="group-title" data-value="2">group2</h1>    <input type="checkbox" data-value="2">item1    <input type="checkbox" data-value="2">item2    <input type="checkbox" data-value="2">item3    <input type="checkbox" data-value="2">item4  </div>    <div class="output">here show titles</div>  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


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