html hidden row

HTML hidden rows: How to hide rows through HTML?

In web development, hidden rows of page tables are usually used to display different data or to display some special information under different circumstances. Hidden rows are becoming more and more popular among website designers and are now becoming easier to implement. In this article, we will explain in detail how to hide rows through HTML.

Generally speaking, the implementation of hidden rows is controlled through CSS styles. CSS is one of the most commonly used technologies in website development. It can help us control the appearance and behavior of HTML tags, including fonts, colors, sizes, positions, alignments, and more. When we use CSS to hide a row, we need to use the "display:none" style to set the row to be hidden to an invisible state. Below is a simple HTML table and how to hide certain rows in it via CSS.

<table>
  <tr>
    <th>Name</th>
    <th>Age</th>
    <th>Gender</th>
  </tr>
  <tr>
    <td>John</td>
    <td>25</td>
    <td>Male</td>
  </tr>
  <tr style="display:none">
    <td>Jane</td>
    <td>30</td>
    <td>Female</td>
  </tr>
  <tr>
    <td>Jack</td>
    <td>45</td>
    <td>Male</td>
  </tr>
</table>

In this example, we want to hide the row containing "Jane" in the second row. We do this by adding the "display:none" style to the HTML tr tag.

When the page is rendered, the row will be hidden, so that the table no longer contains all rows. However, this method only hides certain lines in the code, rather than truly eliminating all lines. For some data that needs to be provided to the user, this method is not secure enough, because the user can easily inspect the page source code and discover the hidden content.

For more stringent hiding requirements, we can use JavaScript. JavaScript is a scripting language that can be used to control interactions and dynamic behavior in websites. When hiding a row using JavaScript, we can remove it directly from the user's view, thus completely eliminating the row's presence. Below is an example of using JavaScript to hide rows.

<table>
  <tr>
    <th>Name</th>
    <th>Age</th>
    <th>Gender</th>
  </tr>
  <tr>
    <td>John</td>
    <td>25</td>
    <td>Male</td>
  </tr>
  <tr id="hiderow" style="display:none">
    <td>Jane</td>
    <td>30</td>
    <td>Female</td>
  </tr>
  <tr>
    <td>Jack</td>
    <td>45</td>
    <td>Male</td>
  </tr>
</table>

<script>
  var rowToHide = document.getElementById("hiderow");
  rowToHide.parentNode.removeChild(rowToHide);
</script>

In this example, we add an "id" attribute to mark the line that will be operated on in the JavaScript code. We then wrote a piece of JavaScript code to completely remove the line from the page. When the page is rendered, the row will no longer appear in it. This method is safer than using CSS to hide rows because the user cannot discover from the source code what has been removed.

Summary

In this article, we briefly introduced how to implement hidden rows using HTML, CSS, and JavaScript. Hiding rows using CSS is easier, but not secure enough. Hiding rows using JavaScript is relatively cumbersome, but safer. We can choose to use specific methods to hide rows according to the situation. In practice, many websites use these techniques to hide rows to achieve better page display and data hiding effects.

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