Removing a JQuery Element Upon Parent Position Adjustment

Question

Removing a JQuery Element Upon Parent Position Adjustment

I'm currently working on a website that features a sticky navbar, and I'm trying to implement a symbol that appears when the navbar reaches the very top of the page as the user scrolls down. However, I'm encountering an issue where the symbol does not reappear when the navbar leaves the top of the page as the user scrolls up.

Below you'll find the JavaScript code and HTML for the navigation:

$(document).ready(function() {

  var distance = $('#navbar').offset().top,
    $window = $(window);


  $(window).scroll(function() {
    if ($window.scrollTop() < distance) {
      $("#nav").remove(
        "<li id=\"navSymbol\"><a href=\"#\">▲</a></li>");

    }

    if ($window.scrollTop() >= distance) {
      if ($("#navSymbol").length) {
        console.log("not adding")

      } else {
        $("#nav").prepend(
          "<li id=\"navSymbol\"><a href=\"#\">▲</a></li>");
      }
    }


  });

});

<head>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
</head>

<div style="height: 25vw;"></div>

<div class="sticky-top" id="navbar" style="padding-top: 3vw; padding-bottom: 3vw; background-color: white;">
  <ul class="nav justify-content-center sticky-top" id="navcontent">
    <li class="nav-item">
      <a class="nav-link active" id="nav" href="#about">About</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Staffing</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Marketing and Finance</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Future Prospects</a>
    </li>
  </ul>
</div>

<div style="height: 100vw;"></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous">
</script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous">
</script>

If anyone can offer some assistance, it would be greatly appreciated!

javascript jquery html css nav

Answer 1

Answer №1

When the remove method is called, it does not immediately delete the node.

Using the remove method without any arguments removes the current node.
Providing an argument with the remove method removes the element based on the specified selector.

If you provide HTML to generate a selector for a node that is not part of the DOM document, removing it will have no effect since it's not present.

You can experiment with something like this:

$(document).ready(function() {
    var distance = $('#navbar').offset().top,
        $window = $(window);

    $(window).scroll(function() {
    if ($window.scrollTop() < distance) {
        $("#navSymbol").remove();
    }

    if ($window.scrollTop() >= distance) {
        if ($("#navSymbol").length) {
            console.log("not adding")
        } else {
            $("#nav").prepend("<li id=\"navSymbol\"><a href=\"#\">▲</a></li>");
        }
    }
});

Answer 2

When the remove method is called, it does not immediately delete the node.

Using the remove method without any arguments removes the current node.
Providing an argument with the remove method removes the element based on the specified selector.

If you provide HTML to generate a selector for a node that is not part of the DOM document, removing it will have no effect since it's not present.

You can experiment with something like this:

$(document).ready(function() {
    var distance = $('#navbar').offset().top,
        $window = $(window);

    $(window).scroll(function() {
    if ($window.scrollTop() < distance) {
        $("#navSymbol").remove();
    }

    if ($window.scrollTop() >= distance) {
        if ($("#navSymbol").length) {
            console.log("not adding")
        } else {
            $("#nav").prepend("<li id=\"navSymbol\"><a href=\"#\">▲</a></li>");
        }
    }
});

Answer 3

Answer №2

If you want to hide an element using jQuery, you can simply utilize the hide function and then show it again with the show function.

$(document).ready(function() {
  var prevDist = 0;

  $(window).scroll(function() {
    var dist = $('#navbar').offset().top;
    if (prevDist < dist) {
      $("#navSymbol").hide();
    }
    else {
      $("#navSymbol").show();
    }
    prevDist = dist;
  });

});

<head>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
</head>

<div style="height: 25vw;"></div>

<div class="sticky-top" id="navbar" style="padding-top: 3vw; padding-bottom: 3vw; background-color: white;">
  <ul class="nav justify-content-center sticky-top" id="navcontent">
    <li id="navSymbol"><a href=\"#\">▲</a></li>
    <li class="nav-item">
      <a class="nav-link active" id="nav" href="#about">About</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Staffing</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Marketing and Finance</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Future Prospects</a>
    </li>
  </ul>
</div>

<div style="height: 100vw;"></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous">
</script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous">
</script>

Answer 4

If you want to hide an element using jQuery, you can simply utilize the hide function and then show it again with the show function.

$(document).ready(function() {
  var prevDist = 0;

  $(window).scroll(function() {
    var dist = $('#navbar').offset().top;
    if (prevDist < dist) {
      $("#navSymbol").hide();
    }
    else {
      $("#navSymbol").show();
    }
    prevDist = dist;
  });

});

<head>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
</head>

<div style="height: 25vw;"></div>

<div class="sticky-top" id="navbar" style="padding-top: 3vw; padding-bottom: 3vw; background-color: white;">
  <ul class="nav justify-content-center sticky-top" id="navcontent">
    <li id="navSymbol"><a href=\"#\">▲</a></li>
    <li class="nav-item">
      <a class="nav-link active" id="nav" href="#about">About</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Staffing</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Marketing and Finance</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Future Prospects</a>
    </li>
  </ul>
</div>

<div style="height: 100vw;"></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous">
</script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous">
</script>

Answer 5

Answer №3

An issue lies within your code where the 'remove' method eliminates nodes found in the jQuery collection that triggered the call when 'remove()' is executed.

Consider this:

 $("#nav").text("About");

instead of

$("#nav").remove(
    "<li id=\"navSymbol\"><a href=\"#\">▲</a></li>");

Answer 6

An issue lies within your code where the 'remove' method eliminates nodes found in the jQuery collection that triggered the call when 'remove()' is executed.

Consider this:

 $("#nav").text("About");

instead of

$("#nav").remove(
    "<li id=\"navSymbol\"><a href=\"#\">▲</a></li>");

Answer 7

Answer №4

$(document).ready(function() {

var distance = $('#navbar').offset().top,
$window = $(window);


$(window).scroll(function() {
if ($window.scrollTop() < distance) {
  $("#navSymbol").remove();


}

if ($window.scrollTop() >= distance) {
  if ($("#navSymbol").length) {
    console.log("not adding")

  } else {
    $("#nav").prepend(
      "<li id=\"navSymbol\" ><a href=\"#\">▲</a></li>");
  }
}


});

});

<head>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
</head>

<div style="height: 25vw;"></div>

<div class="sticky-top" id="navbar" style="padding-top: 3vw; padding-bottom: 3vw; background-color: white;">
  <ul class="nav justify-content-center sticky-top" id="navcontent">
    <li class="nav-item">
      <a class="nav-link active" id="nav" href="#about">About</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Staffing</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Marketing and Finance</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Future Prospects</a>
    </li>
  </ul>
</div>

<div style="height: 100vw;"></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous">
</script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous">
</script>

To effectively remove elements, use the remove() function provided by jQuery for targeted removal.

Answer 8

$(document).ready(function() {

var distance = $('#navbar').offset().top,
$window = $(window);


$(window).scroll(function() {
if ($window.scrollTop() < distance) {
  $("#navSymbol").remove();


}

if ($window.scrollTop() >= distance) {
  if ($("#navSymbol").length) {
    console.log("not adding")

  } else {
    $("#nav").prepend(
      "<li id=\"navSymbol\" ><a href=\"#\">▲</a></li>");
  }
}


});

});

<head>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
</head>

<div style="height: 25vw;"></div>

<div class="sticky-top" id="navbar" style="padding-top: 3vw; padding-bottom: 3vw; background-color: white;">
  <ul class="nav justify-content-center sticky-top" id="navcontent">
    <li class="nav-item">
      <a class="nav-link active" id="nav" href="#about">About</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Staffing</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Marketing and Finance</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" id="nav" href="#">Future Prospects</a>
    </li>
  </ul>
</div>

<div style="height: 100vw;"></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous">
</script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous">
</script>

To effectively remove elements, use the remove() function provided by jQuery for targeted removal.

Removing a JQuery Element Upon Parent Position Adjustment

Answer №1

Answer №2

Answer №3

Answer №4

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