Drop down list and html

How TO — Hoverable Dropdown

Learn how to create a hoverable dropdown menu with CSS.

Dropdown

A dropdown menu is a toggleable menu that allows the user to choose one value from a predefined list:

Create A Hoverable Dropdown

Create a dropdown menu that appears when the user moves the mouse over an element.

Step 1) Add HTML:

Example

Example Explained

Use any element to open the dropdown menu, e.g. a , or

element.

Use a container element (like ) to create the dropdown menu and add the dropdown links inside it.

Wrap a element around the button and the to position the dropdown menu correctly with CSS.

Step 2) Add CSS:

Example

/* Dropdown Button */
.dropbtn background-color: #04AA6D;
color: white;
padding: 16px;
font-size: 16px;
border: none;
>

/* The container — 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

/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content

/* Change the background color of the dropdown button when the dropdown content is shown */
.dropdown:hover .dropbtn

Example Explained

We have styled the dropdown button with a background-color, padding, etc.

The .dropdown class uses position:relative , which is needed when we want the dropdown content to be placed right below the dropdown button (using position:absolute ).

The .dropdown-content class holds the actual dropdown menu. It is hidden by default, and will be displayed on hover (see below). Note the min-width is set to 160px. Feel free to change this. Tip: If you want the width of the dropdown content to be as wide as the dropdown button, set the width to 100% (and overflow:auto to enable scroll on small screens).

Instead of using a border, we have used the box-shadow property to make the dropdown menu look like a «card». We also use z-index to place the dropdown in front of other elements.

The :hover selector is used to show the dropdown menu when the user moves the mouse over the dropdown button.

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HTML Drop-down Menu – How to Add a Drop-Down List with the Select Element

Joel Olawanle

Many websites, applications, and web pages use drop-down menus to help display a list of information. You can use them to create navigation menus, options for forms, and more.

If you’re looking at some of these menus or lists, you might imagine how complex creating them could be. And yes – in some cases, it gets a little bit complex.

A drop-down menu is a list of options that gets revealed vertically when a user interacts with the menu by either clicking on it or hovering over it with their cursor.

This menu also disappears when the user stops interacting with the menu by clicking again or taking the cursor away from the menu.

In this article, you will learn how to add a drop-down list to the select element on your webpage. You’ll also learn the various options available, and how to create a hoverable drop-down list/menu.

How to Create an HTML Dropdown List

In HTML, by default, you can always create a drop-down list with the select tag alongside the option tag. This is mainly used within forms to select a value from a list of many options.

The select tag has two primary attributes: the name and id attributes.

You use the name attribute to identify the drop-down when a selection is submitted in a form. You can connect the id attribute to a label that has similar values to its for attribute.

The select tag also has some optional boolean attributes like disabled (which disables the select fields), required (which makes the field required in a form), and lots more.

Within the select tag, you can add many options in the individual option tag. The option tag has an attribute of value that specifies a value that is submitted from the form when an option gets selected.

There are other boolean attributes like disabled (which disables the option in the menu), and selected (which you use to set a particular option as the default selected option when the page loads rather than the first option).

In the above code, the first option has an attribute of disabled , meaning you will not be able to select the option. The fourth option has an attribute of selected , meaning that instead of having JavaScript as the selected value by default, Java will be selected.

How to Create a Hover-able Drop-down Menu

When you scroll through or visit many advanced and modern webpages, you will notice that they have drop-down menus.

These menus are used for navigation to help hold similar links together. Most times, when you hover on the parent menu, then the drop-down list appears.

You can create these types of menues in various ways, as there is no direct syntax to build one.

You can create this using CSS styling to show and hide the drop-down list when the user hovers over the menu. A very good approach is to create a div that holds the menu and the drop-down.

This div serves as a container and you can style it to a position of relative and display of inline-block , so the drop-down options appear below the menu.

You can style your button and the dropdown-options however you wish. But the major style that controls the hover effect, by default, sets the dropdown-options not to display. Then when a mouse hovers over the menu, the display is not set to block , so the options are visible. You also set the position to absolute , so the options appear below the menu, and overflow to auto to enable scroll on small screens.

.dropdown-options < display: none; position: absolute; overflow: auto; >.dropdown:hover .dropdown-options

In the demo below, we add more styling to make the drop-down menu more attractive and nice:

Wrapping Up

In this article, you have learned how to create a drop-down list with the select tag. You’ve also learned how to create the hoverable drop-down menu with CSS to handle the hover effect.

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CSS Dropdowns

Create a dropdown box that appears when the user moves the mouse over an element.

Example

.dropdown-content display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
padding: 12px 16px;
z-index: 1;
>

.dropdown:hover .dropdown-content display: block;
>

Example Explained

HTML) Use any element to open the dropdown content, e.g. a , or a element.

Use a container element (like ) to create the dropdown content and add whatever you want inside of it.

Wrap a element around the elements to position the dropdown content correctly with CSS.

CSS) The .dropdown class uses position:relative , which is needed when we want the dropdown content to be placed right below the dropdown button (using position:absolute ).

The .dropdown-content class holds the actual dropdown content. It is hidden by default, and will be displayed on hover (see below). Note the min-width is set to 160px. Feel free to change this. Tip: If you want the width of the dropdown content to be as wide as the dropdown button, set the width to 100% (and overflow:auto to enable scroll on small screens).

Instead of using a border, we have used the CSS box-shadow property to make the dropdown menu look like a «card».

The :hover selector is used to show the dropdown menu when the user moves the mouse over the dropdown button.

Dropdown Menu

Create a dropdown menu that allows the user to choose an option from a list:

This example is similar to the previous one, except that we add links inside the dropdown box and style them to fit a styled dropdown button:

Example

/* The container — 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: #f9f9f9;
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

/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content display: block;
>

/* Change the background color of the dropdown button when the dropdown content is shown */
.dropdown:hover .dropbtn background-color: #3e8e41;
>

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How TO — Clickable Dropdown

Learn how to create a clickable dropdown menu with CSS and JavaScript.

Dropdown

A dropdown menu is a toggleable menu that allows the user to choose one value from a predefined list:

Create a Clickable Dropdown

Create a dropdown menu that appears when the user clicks on a button.

Step 1) Add HTML:

Example

Example Explained

Use any element to open the dropdown menu, e.g. a , or

element.

Use a container element (like ) to create the dropdown menu and add the dropdown links inside it.

Wrap a element around the button and the to position the dropdown menu correctly with CSS.

Step 2) Add CSS:

Example

/* Dropdown Button */
.dropbtn background-color: #3498DB;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
>

/* The container — 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

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

Example Explained

We have styled the dropdown button with a background-color, padding, hover effect, etc.

The .dropdown class uses position:relative , which is needed when we want the dropdown content to be placed right below the dropdown button (using position:absolute ).

The .dropdown-content class holds the actual dropdown menu. It is hidden by default, and will be displayed on hover (see below). Note the min-width is set to 160px. Feel free to change this. Tip: If you want the width of the dropdown content to be as wide as the dropdown button, set the width to 100% (and overflow:auto to enable scroll on small screens).

Instead of using a border, we have used the box-shadow property to make the dropdown menu look like a «card». We also use z-index to place the dropdown in front of other elements.

Step 3) Add JavaScript:

Example

/* When the user clicks on the button,
toggle between hiding and showing the dropdown content */
function myFunction() document.getElementById(«myDropdown»).classList.toggle(«show»);
>

// Close the dropdown menu if the user clicks outside of it
window.onclick = function(event) if (!event.target.matches(‘.dropbtn’)) var dropdowns = document.getElementsByClassName(«dropdown-content»);
var i;
for (i = 0; i < dropdowns.length; i++) var openDropdown = dropdowns[i];
if (openDropdown.classList.contains(‘show’)) openDropdown.classList.remove(‘show’);
>
>
>
>

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