How Can JavaScript Precisely Style Specific Lines of Text in a Paragraph, Overcoming CSS Limitations?

Selecting Specific Lines of Text with CSS and JS

Styling specific lines of text can be challenging, especially when CSS pseudo-elements like :first-line are limited to the first line. This article explores a JavaScript solution that addresses this limitation.

One use case of this solution is to highlight every even row of a paragraph for enhanced readability. Pre-formatting the text by wrapping each line in a span with a unique class allows for targeted styling. However, determining where to split the text can be complex, particularly with variable paragraph widths.

JavaScript offers a practical solution for this challenge. The provided code wraps each word in a span element and assigns a class based on the span's position during window resizing. The line count is incremented when a span's vertical position changes, and the corresponding class ('line' followed by the line number) is assigned to the span.

Using this approach, even/odd line discrimination becomes a straightforward task. For improved efficiency, the code could be optimized further. However, the provided implementation serves as a foundational proof of concept.

Edge cases should be considered, such as where class styles alter word size or width, as these could lead to inaccurate line splitting.

A working demonstration of this solution is available at https://jsbin.com/piwizateni/1/edit?html,css,js,output, showcasing the selective highlighting of even-numbered lines of a paragraph.

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