css table does not show borders

In web development, tables are one of the frequently used elements. Tables can display a large amount of data or display the layout of the page, etc. In CSS, you can add a border to a table through the border attribute, but sometimes we find that even if the border attribute is set, the border of the table cannot be displayed.

This article will discuss some possible reasons why CSS tables do not display borders and how to solve these problems.

Reason 1: There is a higher priority style in the CSS cascading style sheet

In CSS, when multiple style rules are used for the same element, the browser will proceed according to the priority. Application of styles. If there is a higher priority style rule, the style of the current rule will be overwritten and the style will not be displayed.

Solution:

Find whether there are higher priority style rules in the source code that conflict with the style rules of the table. You can view the attributes and styles of the elements through the browser developer tools and check The issue of style priority.

Reason 2: The display attribute of the table is set to a non-table value

The border display of the CSS table is based on the display attribute of the table. If this attribute is set to a non-table value, then the table's The style will not take effect, including the display of borders.

Solution:

Make sure the display attribute is set to table or inline-table in CSS, as shown below:

table {
    display: table;
    border-collapse: collapse; /* 去除表格边框的间隙 */
}

Reason three: the border-collapse attribute is set When using the CSS table property for separate

, if the border-collapse property is set to separate, the border will be separated, causing the border to not be displayed.

Solution:

Set the border-collapse attribute of the table to collapse, as shown below:

table {
    border-collapse: collapse; /* 去除表格边框的间隙 */
    border: 1px solid #000; /* 配置表格边框 */
}

Reason 4: Using CSS Reset style

Sometimes we use the CSS Reset style during the development process. This style will reset the styles of all elements to default values, which may affect the display of table borders.

Solution:

If the CSS Reset style is used, please set the style rules of the table separately to ensure that the border can be displayed normally.

Reason 5: Browser Bug

In actual development, some browser versions have some bugs, which may cause the border of the CSS table not to be displayed.

Solution:

When encountering this situation, you can try to update the browser version or change some attribute configurations of the table to be compatible with this version of the browser.

Summary:

There may be many situations when CSS table does not display borders. If you encounter this problem, you can eliminate the reasons one by one through the above methods. During the development process, in order to avoid this kind of problem, it is recommended to carefully consider and write when designing the table style to ensure that the code is correct and clear.

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