Web Front-endFront-end Q&AHow 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 is useEffect? How do you use it to perform side effects?Mar 19, 2025 pm 03:58 PMThe article discusses useEffect in React, a hook for managing side effects like data fetching and DOM manipulation in functional components. It explains usage, common side effects, and cleanup to prevent issues like memory leaks.
Explain the concept of lazy loading.Mar 13, 2025 pm 07:47 PMLazy loading delays loading of content until needed, improving web performance and user experience by reducing initial load times and server load.
How does currying work in JavaScript, and what are its benefits?Mar 18, 2025 pm 01:45 PMThe article discusses currying in JavaScript, a technique transforming multi-argument functions into single-argument function sequences. It explores currying's implementation, benefits like partial application, and practical uses, enhancing code read
What are higher-order functions in JavaScript, and how can they be used to write more concise and reusable code?Mar 18, 2025 pm 01:44 PMHigher-order functions in JavaScript enhance code conciseness, reusability, modularity, and performance through abstraction, common patterns, and optimization techniques.
How does the React reconciliation algorithm work?Mar 18, 2025 pm 01:58 PMThe article explains React's reconciliation algorithm, which efficiently updates the DOM by comparing Virtual DOM trees. It discusses performance benefits, optimization techniques, and impacts on user experience.Character count: 159
What is useContext? How do you use it to share state between components?Mar 19, 2025 pm 03:59 PMThe article explains useContext in React, which simplifies state management by avoiding prop drilling. It discusses benefits like centralized state and performance improvements through reduced re-renders.
How do you prevent default behavior in event handlers?Mar 19, 2025 pm 04:10 PMArticle discusses preventing default behavior in event handlers using preventDefault() method, its benefits like enhanced user experience, and potential issues like accessibility concerns.
How do you connect React components to the Redux store using connect()?Mar 21, 2025 pm 06:23 PMArticle discusses connecting React components to Redux store using connect(), explaining mapStateToProps, mapDispatchToProps, and performance impacts.
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Dreamweaver Mac version
Visual web development 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.
PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
SublimeText3 Chinese version
Chinese version, very easy to use
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
