How to set table height in jquery

In web design, tables are often used to present data. However, the length and height of the table often vary depending on the amount of data. In order to make the table better displayed, we need to control the height of the table. This article mainly introduces how to set the table height with jQuery.

1. Use CSS to set the table height

Before we start introducing jQuery, let’s take a look at how to use CSS to set the table height. In CSS, we can use the height attribute to specify the height of the table. For example, the following code can set a table with a height of 200px.

table {
    height: 200px;
}

This method is simple and easy, but it may cause problems in some cases. For example, when the table content exceeds the specified height, the browser automatically adds scroll bars. And if we set a fixed height, the content may be truncated.

2. Use jQuery to set the table height

Using jQuery to set the table height is a more flexible option. It can not only automatically adjust the table height according to the height of the table content, but also You can control the height range of the table by setting the minimum height and maximum height. The following is the specific implementation method.

2.1 Automatically adjust the height according to the content of the table

We can automatically set the height of the table by calculating the height of the content in the table. The specific implementation method is as follows:

$(document).ready(function(){
   // 获取表格的实际内容高度
   var actualHeight = $('table')[0].scrollHeight;

   // 设置表格最小高度为300px
   var minHeight = 300;

   // 设置表格最大高度为500px
   var maxHeight = 500;

   // 计算表格应设置的高度
   var height = actualHeight < minHeight ? minHeight : (actualHeight > maxHeight ? maxHeight : actualHeight);

   // 设置表格高度
   $('table').css('height', height);
});

In the above code, we first obtain the actual content height of the table, and then set the minimum height and maximum height of the table. Next, we calculate the height that the table should set based on the actual content height and the minimum/maximum height of the table, and use the css() method to set the table height.

2.2 Automatically adjust the height according to the browser window

In some cases, we hope that the height of the table can adaptively change with the size of the browser window. At this time, we can use the resize() method to monitor the browser window size change event and automatically adjust the table height.

The specific implementation method is as follows:

$(document).ready(function(){
   // 监听浏览器窗口大小变化的事件
   $(window).resize(function(){
      // 获取浏览器窗口高度
      var winHeight = $(window).height();

      // 获取表格的实际内容高度
      var actualHeight = $('table')[0].scrollHeight;

      // 计算表格应设置的高度
      var height = winHeight > actualHeight ? actualHeight : winHeight;

      // 设置表格高度
      $('table').css('height', height);
   });

   // 触发一次resize事件，初始化表格高度
   $(window).resize();
});

In the above code, we use the resize() method to listen for events when the browser window size changes. In the listening function, we obtain the browser window height and the actual content height of the table, and calculate the height that the table should be set based on them, and then use the css() method to set the table height. At the end, we also call the resize() method once to initialize the table height.

Summary

In web design, controlling the height of tables is a very common requirement. Setting the table height is simple and easy using CSS, but problems may arise when content exceeds the height range. In contrast, using jQuery is more flexible. The height of the table can be automatically adjusted according to the height of the table content, or the height of the table can be automatically adjusted according to the size of the browser window. I hope this article can solve the problem of table height control for everyone and improve the efficiency of web design.

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