table-layout: fixed will force the table column width to be determined by the cell width of the first row to avoid the content affecting the layout. 1. Set table-layout: fixed and specify the table width; 2. Set the specific column width ratio for the first row th/td; 3. Use white-space: nowrap, overflow: hidden and text-overflow: ellipsis to control text overflow; 4. Suitable for background management, data reports and other scenarios that require stable layout and high-performance rendering, which can effectively prevent layout jitter and improve rendering efficiency.
When using table-layout: fixed
, CSS changes the column width calculation method of HTML tables, making the table layout more predictable and perform better. Here is a practical table-layout: fixed
example and explain its role and usage scenarios.

What is table-layout: fixed
?
By default, table-layout
of the table is auto
, and the browser will automatically adjust the column width according to the content. After setting to fixed
, the column width is determined only by the table width and the width of the first row of cells . The subsequent cell content will not affect the column width, thereby improving rendering performance and avoiding layout jitter.
Sample code
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <title>Fixed Table Layout Example</title> <style> .fixed-table { width: 100%; table-layout: fixed; /* Key: Enable fixed layout*/ border-collapse: collapse; font-family: Arial, sans-serif; } .fixed-table th, .fixed-table td { border: 1px solid #ccc; padding: 10px; text-align: left; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; /* Prevent text line wrapping*/ } .fixed-table th { background-color: #f0f0f0; } /* Manually set column width*/ .fixed-table th:nth-child(1), .fixed-table td:nth-child(1) { width: 20%; /* The first column accounts for 20% */ } .fixed-table th:nth-child(2), .fixed-table td:nth-child(2) { width: 30%; /* The second column accounts for 30% */ } .fixed-table th:nth-child(3), .fixed-table td:nth-child(3) { width: 50%; /* The third column accounts for 50% */ } </style> </head> <body> <table class="fixed-table"> <head> <tr> <th>Name</th> <th>Position</th> <th>Remarks</th> </tr> </head> <tbody> <tr> <td>Zhang San</td> <td>Front-end development engineer</td> <td>Excellent in React and Vue, the code is written very well</td> </tr> <tr> <td>Li Si</td> <td>UI Designer</td> <td>The design draft is perfect in details, and often overtime to modify the drawings</td> </tr> <tr> <td>Wang Wu</td> <td>Data Analyst</td> <td>Millions of data are processed every day, and report generation is automated</td> </tr> </tbody> </table> </body> </html>
Benefits of using table-layout: fixed
- Stable layout : The column width will not change suddenly because a row has too long content.
- Faster rendering : The browser can determine the column width without reading all content.
- Suitable for fixed structure tables : such as background management systems, data reports, etc.
- It is better to use with
text-overflow: ellipsis
: long text automatically truncates the ellipsis.
Things to note
- The table must be set
width
, otherwise thefixed
layout may perform abnormally. - The column width is mainly determined by the cells in the first row (usually
thead
or first rowtr
) . So it is recommended to set the width onth
or first linetd
. - If the first row has no width set, the browser will distribute the column width evenly.
- When the content is too long, remember to control the display with
white-space: nowrap
andoverflow: hidden
.
Common application scenarios
- Background management forms (such as user list, order table)
- Data display interface with fixed column width
- Tables that require ellipsis to truncate long text
- Large performance-sensitive tables (hundreds of thousands of rows)
Basically that's it. table-layout: fixed
seems like a trick, but it is very practical in actual development, especially when you don't want "extra-long content of a certain cell" to ruin the entire table layout.

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