How to achieve text switching effect in JavaScript

With the rapid development of Internet technology, more and more websites need to provide users with a better interactive experience. In this context, JavaScript technology, as a very important front-end development technology, is widely used in web design and development.

This article will introduce a JavaScript method to achieve text switching effects to make your page more vivid and interesting.

1. Requirements Analysis

Web pages often need to classify articles. Using article classification can allow users to find the content they want more quickly and accurately. Common article classification methods include but are not limited to: popular, recommended, latest, comments, etc. What we want to achieve is to achieve the effect of text switching between different categories. The specific requirements are as follows:

1. Hover the mouse over different categories, and the current category text will be changed to the target category text.
2. Realize animation effects to make text modifications smoother and more natural.

3. Implementation method

Before implementation, it is necessary to clarify a basic concept - DOM. DOM (Document Object Model) is the document object model. It is a combination of elements and attributes in Markup languages ​​such as HTML or XML. Through it, elements or attributes on the page can be modified or deleted to achieve dynamic interaction effects on the web page. Based on this concept, we can achieve text switching effects based on DOM operations.

Before implementing the text switching effect, first prepare some necessary HTML and CSS codes, as shown below:

<div>
    <ul>
        <li><a>最新</a></li>
        <li><a>热门</a></li>
        <li><a>推荐</a></li>
        <li><a>评论</a></li>
    </ul>
    <div>
        最新
    </div>
</div>

<style>
    #classify {
        width: 300px;
        height: 50px;
        margin: 0 auto;
        position: relative;
    }
    #classify ul {
        padding: 0;
        margin: 0;
        position: absolute;
        top: 0;
        left: 0;
        z-index: 10;
    }
    #classify li {
        list-style: none;
        float: left;
        margin-right: 10px;
    }
    #classify li a {
        display: block;
        text-decoration: none;
        color: #666;
        font-size: 16px;
    }
    .classify-text {
        position: absolute;
        height: 50px;
        line-height: 50px;
        padding-left: 10px;
        color: #fff;
        background-color: #333;
        border-radius: 5px;
    }
</style>

Here, with the help of HTML and CSS codes, a list of categories and classifications are created. DIV container for text. The category list takes the form of an unordered list to display different categories. The category text has different colors and styles next to it to display the current category.

Next, we can use JavaScript to achieve our text switching effect. The implementation code is as follows:

<script>
    var classify = document.getElementById(&#39;classify&#39;);
    var classifyList = classify.getElementsByTagName(&#39;a&#39;);
    var classifyText = classify.getElementsByClassName(&#39;classify-text&#39;)[0];

    //遍历分类列表添加事件监听器
    for (var i = 0, len = classifyList.length; i < len; i++) {
        //自定义属性获取目标分类名称
        classifyList[i].targetText = classifyList[i].innerHTML;
        classifyList[i].addEventListener(&#39;mouseover&#39;, function() {
            //目标分类名称
            var targetText = this.targetText;
            var curText = classifyText.innerHTML;
            var interval = 10;
            var length = targetText.length > curText.length ? targetText.length : curText.length;
            var count = 0;
            var timer = setInterval(function() {
                //动画效果实现
                classifyText.innerHTML = count >= length ? targetText : targetText.substring(0, count);
                count++;
                if (count > length) {
                    clearInterval(timer);
                }
            }, interval);
        });
    }
</script>

By getting all the a tag elements in the category list, traversing and adding event listeners, when the mouse When hovering over different categories, get the name of the target category and dynamically modify the text of the current category through the setInterval() function. During the implementation of the setInterval() function, the current classification text is refreshed every 10 milliseconds, making the text modification smoother and more natural.

4. Effect display

The above is all the code for JavaScript to achieve text switching effect. Now let us take a look at the actual effect of this effect!

[](https://img.php.cn/)

5. Summary

The above is the entire process of JavaScript to achieve text switching effect. I believe You have mastered the basic points and implementation process of this method. In fact, there are many ways to use JavaScript technology to achieve web page animation effects, and you need to choose according to specific needs. During the development process, you can choose different technologies and methods according to the actual situation to make the page more beautiful, vivid and interesting.

The above is the detailed content of How to achieve text switching effect in JavaScript. For more information, please follow other related articles on the PHP Chinese website!