Unusual CSS hierarchy observed post AJAX content load

Currently, I am facing a puzzling issue where my CSS rules seem to be losing precedence on a page loaded via AJAX. Despite placing my custom CSS file last in the main page, allowing it to take precedence over any bootstrap styles, after loading new content with AJAX, bootstrap overrides my custom styles. The browser's debugging tool confirms that bootstrap is indeed overwriting my properties.

Here is an example of my custom CSS styling:

.mytableclass td {
font-size: small;
text-align: center;
vertical-align: middle;}

The font-size and text alignment from my custom CSS are applied successfully as they are not set by bootstrap, but unfortunately, the vertical alignment gets overridden. I have double-checked that I am not reloading the CSS files on the AJAX-loaded page, yet this conflict persists. Despite spending hours trying to troubleshoot, I have been unable to determine the root cause of this unexpected behavior.

javascriptcssajax

Answer №1

If you haven't shared the Bootstrap CSS class definition, my assumption is that there may be a CSS selector priority conflict.

Could it be that the Bootstrap CSS selector has more specificity than yours? In that case, it will take precedence over any CSS loaded afterwards. To resolve this, either increase the specificity of your selector or use the !important declaration, although it's generally not recommended (refer to ITCSS).

Answer №2

To ensure a specific bit of CSS takes precedence, it is important to use a more specific selector rather than loading it after everything else. While using !important is an option, it is considered a hack and should only be used as a last resort.

For example, if the selector bootstrap uses is .mytableclass td, you can enhance its specificity by adding something in front of it like body .mytableclass td. Alternatively, you can modify the HTML itself by adding an id that will act as a selector specifically for the AJAX CSS.

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