Web Front-endFront-end Q&AHow to implement the small box prompt content that appears when the mouse is moved in javascriptHow to implement the small box prompt content that appears when the mouse is moved in javascript
JavaScript is a very powerful programming language that can be used to implement a variety of functions, including the function of moving the mouse into a small box to prompt content. In this article, we will detail how to implement this functionality using JavaScript.
1. HTML structure
First, we need to create an HTML page and add some elements to the page that require prompt content. For example, we can create a list containing some links.
<ul> <li><a href="#" class="tooltip">Link 1</a></li> <li><a href="#" class="tooltip">Link 2</a></li> <li><a href="#" class="tooltip">Link 3</a></li> <li><a href="#" class="tooltip">Link 4</a></li> <li><a href="#" class="tooltip">Link 5</a></li> </ul>
In this example, we use the "tooltip" class name to identify the element where tip content needs to be added.
2. CSS Style
Next, we need to add CSS styles to these elements to display prompt content when the mouse moves in. We can use the CSS pseudo-class ":after" to create a prompt box, and use the CSS attribute "content" to add prompt text. For example:
.tooltip {
position: relative;
}
.tooltip:hover:after {
content: "This is a tooltip";
position: absolute;
top: 100%;
left: 0;
padding: 5px;
background-color: #000;
color: #fff;
border-radius: 5px;
z-index: 999;
}In this example, we use the "position: relative" attribute to set the relative positioning of the element, and the "position: absolute" attribute to set the absolute positioning of the prompt box. We also used the "top: 100%" and "left: 0" attributes to place the tooltip below the element. We also use some other CSS properties to style the tooltip, such as "padding", "background-color", "color", and "border-radius".
3. JavaScript code
Now that we have created the HTML structure and CSS style, we need to use JavaScript to implement the function of moving the mouse into the small box prompt content.
We can use JavaScript's addEventListener() function to listen to mouse move-in and move-out events, and use JavaScript's style attribute to set the style of the element. For example:
var tooltips = document.querySelectorAll('.tooltip');
for (var i = 0; i < tooltips.length; i++) {
tooltips[i].addEventListener('mouseover', function() {
this.style.position = 'relative';
});
tooltips[i].addEventListener('mouseout', function() {
this.style.position = '';
});
}In this example, we use the document.querySelectorAll() function to select all elements with the "tooltip" class name, and use the for loop and addEventListener() function to monitor mouse movement in and out respectively. event. When the mouse moves in, we use the this keyword to set the "position" attribute of the current element to "relative", and when the mouse moves out, we set the "position" attribute to empty. During this process, the browser will show or hide the prompt box according to the CSS style.
4. Complete code example
Finally, let’s take a look at the complete code example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JavaScript Tooltip</title>
<style>
.tooltip {
position: relative;
}
.tooltip:hover:after {
content: "This is a tooltip";
position: absolute;
top: 100%;
left: 0;
padding: 5px;
background-color: #000;
color: #fff;
border-radius: 5px;
z-index: 999;
}
</style>
</head>
<body>
<ul>
<li><a href="#" class="tooltip">Link 1</a></li>
<li><a href="#" class="tooltip">Link 2</a></li>
<li><a href="#" class="tooltip">Link 3</a></li>
<li><a href="#" class="tooltip">Link 4</a></li>
<li><a href="#" class="tooltip">Link 5</a></li>
</ul>
<script>
var tooltips = document.querySelectorAll('.tooltip');
for (var i = 0; i < tooltips.length; i++) {
tooltips[i].addEventListener('mouseover', function() {
this.style.position = 'relative';
});
tooltips[i].addEventListener('mouseout', function() {
this.style.position = '';
});
}
</script>
</body>
</html>In this example, we use HTML, CSS and JavaScript Technology is used to realize the function of prompting content in a small box when the mouse is moved. Please modify and adjust as necessary to meet your specific needs.
The above is the detailed content of How to implement the small box prompt content that appears when the mouse is moved in javascript. For more information, please follow other related articles on the PHP Chinese website!
What are the limitations of React?May 02, 2025 am 12:26 AMReact'slimitationsinclude:1)asteeplearningcurveduetoitsvastecosystem,2)SEOchallengeswithclient-siderendering,3)potentialperformanceissuesinlargeapplications,4)complexstatemanagementasappsgrow,and5)theneedtokeepupwithitsrapidevolution.Thesefactorsshou
React's Learning Curve: Challenges for New DevelopersMay 02, 2025 am 12:24 AMReactischallengingforbeginnersduetoitssteeplearningcurveandparadigmshifttocomponent-basedarchitecture.1)Startwithofficialdocumentationforasolidfoundation.2)UnderstandJSXandhowtoembedJavaScriptwithinit.3)Learntousefunctionalcomponentswithhooksforstate
Generating Stable and Unique Keys for Dynamic Lists in ReactMay 02, 2025 am 12:22 AMThecorechallengeingeneratingstableanduniquekeysfordynamiclistsinReactisensuringconsistentidentifiersacrossre-rendersforefficientDOMupdates.1)Usenaturalkeyswhenpossible,astheyarereliableifuniqueandstable.2)Generatesynthetickeysbasedonmultipleattribute
JavaScript Fatigue: Staying Current with React and Its ToolsMay 02, 2025 am 12:19 AMJavaScriptfatigueinReactismanageablewithstrategieslikejust-in-timelearningandcuratedinformationsources.1)Learnwhatyouneedwhenyouneedit,focusingonprojectrelevance.2)FollowkeyblogsliketheofficialReactblogandengagewithcommunitieslikeReactifluxonDiscordt
Testing Components That Use the useState() HookMay 02, 2025 am 12:13 AMTotestReactcomponentsusingtheuseStatehook,useJestandReactTestingLibrarytosimulateinteractionsandverifystatechangesintheUI.1)Renderthecomponentandcheckinitialstate.2)Simulateuserinteractionslikeclicksorformsubmissions.3)Verifytheupdatedstatereflectsin
Keys in React: A Deep Dive into Performance Optimization TechniquesMay 01, 2025 am 12:25 AMKeysinReactarecrucialforoptimizingperformancebyaidinginefficientlistupdates.1)Usekeystoidentifyandtracklistelements.2)Avoidusingarrayindicesaskeystopreventperformanceissues.3)Choosestableidentifierslikeitem.idtomaintaincomponentstateandimproveperform
What are keys in React?May 01, 2025 am 12:25 AMReactkeysareuniqueidentifiersusedwhenrenderingliststoimprovereconciliationefficiency.1)TheyhelpReacttrackchangesinlistitems,2)usingstableanduniqueidentifierslikeitemIDsisrecommended,3)avoidusingarrayindicesaskeystopreventissueswithreordering,and4)ens
The Importance of Unique Keys in React: Avoiding Common PitfallsMay 01, 2025 am 12:19 AMUniquekeysarecrucialinReactforoptimizingrenderingandmaintainingcomponentstateintegrity.1)Useanaturaluniqueidentifierfromyourdataifavailable.2)Ifnonaturalidentifierexists,generateauniquekeyusingalibrarylikeuuid.3)Avoidusingarrayindicesaskeys,especiall
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
SublimeText3 Linux new version
SublimeText3 Linux latest version
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
SublimeText3 Chinese version
Chinese version, very easy to use
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
