jquery changes text into photo

With the development of Internet and mobile technology, dynamic effects have become an important direction in web development. Here, we will introduce how to use jQuery to transform text into photos.

In web design, text and pictures are very important elements. They can help websites improve user experience and increase page appeal. Traditionally, text and pictures exist independently, but we can use some techniques to combine them to achieve a more vivid and interesting effect.

The text-to-photo effect can be used in product introductions, website advertisements, travel introductions, etc. As the user hovers over the text, the text fades into a photo, grabbing the user's attention. This effect not only increases the beauty of the page, but also allows users to gain a deeper understanding of the product or service.

JQuery is a very powerful JavaScript library that can help us quickly write js scripts to achieve a variety of dynamic effects. Here, we will introduce how to use jQuery to transform text into photos.

Implementation Ideas

First of all, we need to clarify the basic idea of ​​​​achieving this effect. When the user mouses over the specified text, we need to gradually replace it with an image. Specifically, we can use the following methods:

1. First, we need to pre-set the codes corresponding to text and pictures in the HTML file, which can reduce the complexity of the script.
2. When the user hovers the mouse over the specified text, we need to use jQuery's mouse hover event to trigger the script.
3. In the script, we need to gradually replace the text content with images, which can be achieved by gradually changing the text style.
4. Finally, when the mouse leaves the text, we need to restore the text content to its original style.

Implementation details

Next, we will step by step introduce how to use jQuery to achieve the effect of turning text into photos.

1. Set HTML structure

First, in HTML, we need to pre-set the text that needs to be replaced and the corresponding image. The code is as follows:

<p class="text">这是一段需要替换的文字。</p>
<img class="image" src="image.jpg" alt="这是一张图片。" style="display: none;">

Here, we embed the "This is a paragraph of text that needs to be replaced." into a paragraph, and then set the corresponding image path in the image element.

It should be noted here that in addition to the embedded text element, we also need to set a picture element. The purpose is to gradually change its style in the script, and ultimately achieve the effect of turning text into photos.

2. Design CSS style

Next, we need to set the CSS style, which can provide the necessary style support for the script. The code is as follows:

<style>
.text {
  position: relative;
  z-index: 1;
}

.image {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  opacity: 0;
}
</style>

Here, we set the text element to relative positioning (position: relative;), and then set its level to 1 (z-index: 1;), which ensures that the picture element gradually When replacing text, the text appears on top of the image.

The picture element is set to absolute positioning (position: absolute;), and its level is set to 0 (z-index: 0;), which ensures that the picture is displayed below the text. Additionally, we set the image's transparency to 0 (opacity: 0;) so that it gradually emerges.

3. Writing jQuery script

Next, we need to use jQuery's mouseover event (mouseover) and mouseout event (mouseout) to write the script. The code is as follows:

<script>
$(function() {
  $('.text').mouseover(function() {
    $(this).addClass('active');
  }).mouseout(function() {
    $(this).removeClass('active');
  });
  
  $('.text.active').each(function() {
    var text = $(this).text();
    var image = $(this).next('.image');
    var opacity = 0;
    var timer = setInterval(function() {
      $(this).css('opacity', opacity);
      opacity += 0.1;
      if (opacity >= 1) {
        clearInterval(timer);
        $(this).text('');
        $(this).prev('.text').hide();
      }
    }.bind(image), 50);
  });
});
</script>

Here, we first register the mouseover event (mouseover) and the mouseout event (mouseout) in the document.ready() event.

When the mouse hovers over the text, we will add an .active class, which can provide the necessary conditions for style changes.

When the mouse moves out of the text, we will remove the .active class to restore the original style of the text.

Next, we use jQuery’s each() method to traverse all text elements with the .active class name. For each text element, we will get its text content and corresponding image element, and set a timer to gradually display the image.

In the timer, we will change the transparency of the picture element, hide the text element, delete the text content, and finally display the picture element according to the change of transparency.

4. Complete code

Finally, we integrate the above three aspects of code to form a complete HTML file. The code is as follows:

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <title>jQuery实现文字变照片</title>
  <style>
    .text {
      position: relative;
      z-index: 1;
    }

    .image {
      position: absolute;
      top: 0;
      left: 0;
      z-index: 0;
      opacity: 0;
    }
  </style>
  <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
  <script>
    $(function() {
      $('.text').mouseover(function() {
        $(this).addClass('active');
      }).mouseout(function() {
        $(this).removeClass('active');
      });
      
      $('.text.active').each(function() {
        var text = $(this).text();
        var image = $(this).next('.image');
        var opacity = 0;
        var timer = setInterval(function() {
          $(this).css('opacity', opacity);
          opacity += 0.1;
          if (opacity >= 1) {
            clearInterval(timer);
            $(this).text('');
            $(this).prev('.text').hide();
          }
        }.bind(image), 50);
      });
    });
  </script>
</head>
<body>
  <p class="text">这是一段需要替换的文字。</p>
  <img class="image" src="image.jpg" alt="这是一张图片。" style="display: none;">
</body>
</html>

This HTML file includes three parts: setting the HTML structure, designing CSS styles and writing jQuery scripts, which can achieve the effect of turning text into photos.

Summary

In this article, we introduced how to use jQuery to achieve the effect of turning text into photos. By pre-setting the HTML structure, designing CSS styles, and writing jQuery scripts, we can quickly achieve this effect, thereby enhancing the page's appeal and user experience. At the same time, this also demonstrates the advantages of jQuery in DOM operations and dynamic effects.

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