Variable Declaration and Usage within a CSS File

In CSS, there is a common need to reuse specific values throughout a stylesheet. While there is no explicit variable declaration syntax, there are techniques to achieve this functionality.

One approach is to utilize CSS selectors and style rules. By combining related styles under a single rule, you can avoid repetition while clarifying the scope of each style. For example:

/* Theme color: text */
H1, P, TABLE, UL {
  color: blue;
}

/* Theme color: emphasis */
B, I, STRONG, EM {
  color: #00006F;
}

By organizing styles in this manner, you prevent repetition and make it evident which document elements are affected.

However, it's crucial to note that even though two properties might share the same value, their meanings may differ. Hence, when considering style repetition, prioritize their contextual meanings over their current values. This approach ensures flexibility and reduces the risk of errors in future style updates.