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Kirk Rohani
Full Stack JavaScript Techdegree Student 2,312 PointsWhat if we use both ID selector and Class selector, which takes precedence?
If an HTML tag has both selectors and the CSS file defines let's say background-color (pick any property) for both selectors, which takes precedent, the id or class?
2 Answers
andren
28,558 PointsThe ID selector takes precedence, due to a concept in CSS called Specificity. Specificity is a bit complicated but essentially all CSS rules has a score calculated based on what (and how many) selectors are present in them. The selector with the highest score wins out. ID selectors are prioritized over class selectors, and class selectors are prioritized over element selectors.
A useful resource for understanding Specificity is this Specificity calculator, it allows you to put in two or more CSS rules and shows you in a pretty visual way which gets the higher score and why.
Kirk Rohani
Full Stack JavaScript Techdegree Student 2,312 PointsThanks Andren! So like 2 minutes later in the CSS Basics video Guil ends up answering my question.
I gotta learn to be more patient!