How to popolate this Dropdown correctly?

user_15258325 0
Viewed 63

I'm trying to populate a dropdown menu with jquery with a series of elements (projects) but it doesn't work. From the interface I see the button "dropdown", but if I click it I don't see anything, how can I solve this? When I click it I should see the list of projects that I pass to it (see loop for javascript)

.dropbtn {
  background-color: #3498DB;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}


/* Dropdown button on hover & focus */

.dropbtn:hover,
.dropbtn:focus {
  background-color: #2980B9;
}


/* The container <div> - needed to position the dropdown content */

.dropdown {
  position: relative;
  display: inline-block;
}


/* Dropdown Content (Hidden by Default) */

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}


/* Links inside the dropdown */

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}


/* Change color of dropdown links on hover */

.dropdown-content a:hover {
  background-color: #ddd
}


/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */

.show {
  display: block;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="dropdown">
  <button class="dropbtn">Dropdown</button>
  <div id="myDropdown" class="dropdown-content">
  </div>
</div>

dropdown html jquery javascript
1 Answers

The issue is that you have no way to display the drop down. There's a comment that says "add [.show] on click" - but you can also do this with hover css, so no need for js.

.dropbtn:hover + .dropdown-content {
    display:block;
}

Adding that to your (otherwise working snippet) gives:

var result = {
  "status": 0,
  "message": "OK",
  "projects": ["p1", "p2", "p3"]
}
for (var i = 0; i < result.projects.length; i++) {
  $('#myDropdown').append('<a data-id= "' + i + '">' + result.projects[i] + '</a>');
}
.dropbtn:hover + .dropdown-content {
    display:block;
}


.dropbtn {
  background-color: #3498DB;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}


/* Dropdown button on hover & focus */

.dropbtn:hover,
.dropbtn:focus {
  background-color: #2980B9;
}


/* The container <div> - needed to position the dropdown content */

.dropdown {
  position: relative;
  display: inline-block;
}


/* Dropdown Content (Hidden by Default) */

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}


/* Links inside the dropdown */

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}


/* Change color of dropdown links on hover */

.dropdown-content a:hover {
  background-color: #ddd
}


/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */

.show {
  display: block;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="dropdown">
  <button class="dropbtn">Dropdown</button>
  <div id="myDropdown" class="dropdown-content">
  </div>
</div>

If you do want it on click, then you need to add a click handler, eg:

$(".dropbtn").click(() => { $(".dropdown-content").toggleClass("show") });

Giving:

var result = {
  "status": 0,
  "message": "OK",
  "projects": ["p1", "p2", "p3"]
}
for (var i = 0; i < result.projects.length; i++) {
  $('#myDropdown').append('<a data-id= "' + i + '">' + result.projects[i] + '</a>');
}
$(".dropbtn").click(() => { $(".dropdown-content").toggleClass("show") });
.dropbtn {
  background-color: #3498DB;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}


/* Dropdown button on hover & focus */

.dropbtn:hover,
.dropbtn:focus {
  background-color: #2980B9;
}


/* The container <div> - needed to position the dropdown content */

.dropdown {
  position: relative;
  display: inline-block;
}


/* Dropdown Content (Hidden by Default) */

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}


/* Links inside the dropdown */

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}


/* Change color of dropdown links on hover */

.dropdown-content a:hover {
  background-color: #ddd
}


/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */

.show {
  display: block;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="dropdown">
  <button class="dropbtn">Dropdown</button>
  <div id="myDropdown" class="dropdown-content">
  </div>
</div>

user_21815140
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