Why Isn\'t My CSS Selector `h3:nth-child(1):contains(\'a\')` Working?

Troubleshooting CSS Selector: h3:nth-child(1):contains('a') Not Working

This article addresses the issue of the CSS selector h3:nth-child(1):contains('a') not returning any results, despite its expected functionality.

Even though the component selector h3:nth-child(1) retrieves the target element, the issue arises in the use of :contains() function. The :contains() selector was intended to be a CSS3 selector but was eventually not included in the final specification.

Reason for Non-Functionality

Due to the architecture of :contains(), using it in conjunction with universal selectors or for specific style properties poses performance challenges. The selector tends to return not only matching elements but also their ancestors, resulting in unexpected selections.

Alternative Methods

Since there are no equivalent CSS selectors to :contains(), alternative approaches are required:

• HTML Modification: Update the HTML structure to separate the elements to be selected.
• jQuery's :contains(): Utilize jQuery's :contains() function for its supported usage.

Tips for jQuery and Selenium RC Users

• jQuery's :contains() function is implemented based on the early CSS3 specification.
• Exercise caution when using it to avoid unforeseen results.

Alternative Syntax for h3:nth-child(1)

As a final note, the selector h3:nth-child(1) can be expressed using the CSS2 standard as h3:first-child with increased browser compatibility.

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