Learn the secret behind the new conditions and how to use them correctly

CSSTip serves as a treasure trove of knowledge for frontend developers striving to master the art of Cascading Style Sheets (CSS). Through concise tips, detailed tutorials, and creative demonstrations, readers embark on a journey to harness the full potential of CSS for web design and development. From responsive layouts to  animations, CSSTip empowers developers to create visually stunning and user-friendly web experiences.

CSS Tip

Modern CSS offers two ways to express conditions: inline `if()` and style queries, both using a `style()` syntax. A subtle but important distinction exists between using `:` vs `=` in style conditions. The colon syntax (`style(--n: 3)`) performs exact computed-value string matching, meaning `calc(6/2)` does NOT equal `3`. The equals syntax (`style(--n = 3)`) performs numerical range comparison, substituting custom properties and computing values, so `calc(6/2)` DOES equal `3`. The colon form is best for string-like matching (e.g., `style(--stock: low)`), while the equals form is suited for numeric/math comparisons (e.g., `style(--n = 5)`).

The Hidden Trick of Style Queries and if()

<p>This is a really important detail. I’ve run into bugs before because <code>:</code> didn’t match calculated values—using <code>=</code> for numeric comparisons makes style queries much more reliable.</p>
