How to use JavaScript to achieve dynamic flashing effect of page title?-JS Tutorial-php.cn

How to use JavaScript to achieve dynamic flashing effect of page title?

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Release： 2023-10-16 08:39:31

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如何使用 JavaScript 实现页面标题的动态闪烁效果？

How to use JavaScript to achieve a dynamic flashing effect of the page title?

In web design, dynamic effects can add vividness and appeal to the page. Among them, the dynamic flashing effect of the page title can often attract the user's attention and make the web page more eye-catching. This article will introduce how to use JavaScript to achieve the dynamic flashing effect of page titles and provide specific code examples.

To achieve the dynamic flashing effect of the page title, we need to use timers and DOM operations in JavaScript. The specific implementation steps are as follows:

Create an HTML file and add a <title> element in the <head> tag , used to display the page title. For example:
```
<!DOCTYPE html>
<html>
<head>
  <title>动态闪烁效果</title>
</head>
<body>
  
</body>
</html>
```
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Add a <script> element in the <body> tag for writing JavaScript code. For example:

<!DOCTYPE html>
<html>
<head>
  <title>动态闪烁效果</title>
</head>
<body>
  <!-- 页面内容 -->
  <script>
 // JavaScript 代码将在这里编写
  </script>
</body>
</html>

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In the JavaScript code, first get the title element. You can use the document.querySelector() method to get the <title> element. For example:
```
let title = document.querySelector('title');
```
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Define a variable to record the flashing status. We can use Boolean type variables (true/false) to represent the status of the title flashing. For example:
```
let blinking = false;
```
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Use the setInterval() function to create a timer to change the status of the title regularly. The timer accepts two parameters, the first parameter is a callback function, and the second parameter is the time interval (in milliseconds). For example:
```
setInterval(function() {
  // 定时器代码将在这里编写
}, 500);
```
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The above code indicates that the timer callback function is executed every 500 milliseconds.
In the timer callback function, change the content of the title according to the current flashing state. Use conditional statements to determine the current state, and use the title's innerText property to set the title's content. For example:
```
setInterval(function() {
  if (blinking) {
 title.innerText = '【闪烁】动态闪烁效果';
  } else {
 title.innerText = '动态闪烁效果';
  }
  blinking = !blinking;
}, 500);
```
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The above code means that if the current flashing state is true, the title will be set to the [Flash] dynamic flashing effect; otherwise, the title will be set to the dynamic flashing effect. Then invert the flashing state so that it switches state the next time through the loop.
Save and run the HTML file to view the effect in the browser. You can see that the title flashes every 500 milliseconds, switching to display different title content.

The above code implements the basic page title flashing effect. According to actual needs, you can also perform more customization and expansion, such as changing the flashing color, adjusting the flashing frequency, etc.

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