How to hide tag

The tag in HTML is a tag used to create table rows, which can put a set of table data in the same row. However, in some cases, we may want to hide a certain tag. For example, when we dynamically add rows to the page through JavaScript, we need to hide the row first and then display it as needed. This article will introduce several methods to hide the tag.

1. Use CSS to hide the tag

CSS is a very powerful style language that can control the display and layout of elements in HTML. It can be hidden by setting the display attribute of the tag. The display attribute controls the display mode of the element and has the following values:

• block: displayed on the same line;
• inline: displayed on the same line;
• none: Hidden elements.

So, if we want to hide a tag, we only need to set its display attribute to none. As shown below:

tr.hide {
  display: none;
}

After adding this line of CSS, we can add a class name to the tag that needs to be hidden, such as "hide", and then manipulate the class name of the element in JavaScript to set the row to hide or show.

2. Use JavaScript to hide the tag

In addition to using CSS, we can also use JavaScript to dynamically hide the tag. Using JavaScript allows us to more flexibly control the display and hiding of elements, and can dynamically add, move and modify the content of table rows.

1. By setting the style attribute of the element

The row can be hidden or shown by setting the style.display attribute of the tag, as follows:

// 隐藏
document.getElementById("trId").style.display = "none";

// 显示
document.getElementById("trId").style.display = "table-row";

The advantage of this method is that it is simple and easy to understand. The disadvantage is that the style of the element needs to be directly manipulated in the JavaScript code. When the style needs to be modified, the JavaScript code needs to be modified.

2. Control the display and hiding of elements by adding or removing classes

We can control the display and hiding of elements by adding or removing a class name, as follows Shown:

tr.hide {
  display: none;
}

// 隐藏
document.getElementById("trId").classList.add("hide");

// 显示
document.getElementById("trId").classList.remove("hide");

The advantage of this method is that you can use CSS to manage styles, making the code clearer and easier to maintain.

3. Summary

Through the above two methods, we can achieve the effect of hiding the tag. The method using CSS is simpler, but not flexible enough; the method using JavaScript can control the display and hiding of elements more flexibly. In actual development, we can choose different methods according to specific circumstances.

The above is the detailed content of How to hide tag. For more information, please follow other related articles on the PHP Chinese website!