Why inserting jquery script changed CSS?

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When I insert jquery code css is changing,dropdown menu button has style like active button, but dropdown menu button have to have other styles. Until I inserted jquery all worked well.

JSFiddle[^]

<head>
  <title></title>

  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" integrity="sha384-9gVQ4dYFwwWSjIDZnLEWnxCjeSWFphJiwGPXr1jddIhOegiu1FwO5qRGvFXOdJZ4" crossorigin="anonymous">

</head>

<body>

    <div class="menu">
      <ul class="nav nav-pills">
        <li class="nav-item">
          <a class="nav-link active uppercase activeButton" href="#">Home</a>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle uppercase  outline" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Pages</a>
          <div class="dropdown-menu dropdown-menu-right">
            <div class="wrapperForDropdomnUpArrow">
              <div class="dropdownUpArrow">
              </div>
            </div>
            <a class="dropdown-item uppercase aboutUs" href="#">About us</a>
            <a class="dropdown-item uppercase" href="#">Company</a>
          </div>
        </li>
        <li class="nav-item">
          <a class="nav-link uppercase outline" href="#">Product</a>
        </li>
    </div> 






<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js" integrity="sha384-cs/chFZiN24E4KMATLdqdvsezGxaGsi4hLGOzlXwp5UZB1LY//20VyM2taTB4QvJ" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js" integrity="sha384-uefMccjFJAIv6A+rW+L4AHf99KvxDjWSu1z9VI8SKNVmz4sk7buKt/6v9KI65qnm" crossorigin="anonymous"></script>

<pre lang="CSS">
.menu a:hover {
  color: #fff;
  background: #000;
  border-radius: 3px;
  transition: 0.4s; }

.menu a {
  font-size: 12px;
  font-family: montserrat;
  color: #afb0b1;
  text-align: center;
  padding: 16px 19px;
  line-height: 12px;
  margin: 0px -5px; }

.nav-pills .nav-link.active, .nav-pills .show > .nav-link {
  background-color: #f3f6f9;
  color: #000; }

.dropdown-menu {
  background-color: #000;
  padding: 0px;
  border: 0;
  margin: 1px 0px 0px 0px; }

.dropdown-menu a {
  text-align: left;
  padding: 12.5px 69px 12.5px 22px;
  line-height: 12px;
  margin: 0; }

.dropdown-menu .aboutUs {
  text-align: left;
  padding: 20px 69px 12.5px 22px;
  line-height: 12px; }

.dropdown-menu .FAQ {
  text-align: left;
  padding: 12.5px 69px 20px 22px;
  line-height: 12px; }

a.nav-link.dropdown-toggle:focus {
  color: #fff;
  background: #000;
  border-radius: 3px; }

This script give the issue

$( ".dropdown-menu" ).css('margin-top',0);
$( ".dropdown" )
  .mouseover(function() {
    $( this ).addClass('show').attr('aria-expanded',"true");
    $( this ).find('.dropdown-menu').addClass('show');
  })
  .mouseout(function() {
    $( this ).removeClass('show').attr('aria-expanded',"false");
    $( this ).find('.dropdown-menu').removeClass('show');
  });

What I have tried:

I tried remove css style to understand why, but it didn't help.

Posted 1-May-18 4:49am

Mark00s0011

Updated 1-May-18 5:06am

v2

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1 solution

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Bryian Tan · Answer 1 · 2018-05-01T05:07:00

Based on the demo provided, look like the issue is the dropdown menu appears all the way to the left. Look like the page is using bootstrap and the left identation is drive by this style.

CSS

.dropdown-menu-right {
    right: 0;
    left: auto;
}

I would suggest to remove the style dropdown-menu-right from this line

<div class="dropdown-menu dropdown-menu-right">

to

<div class="dropdown-menu">

By the way, the html markup is missing a close tag for <ul>

Why inserting jquery script changed CSS?

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Why inserting jquery script changed CSS?

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