698: Why You Should Be Using CSS @Layers

This podcast episode explains the concept of layers in CSS and how they determine the stacking order and visual display of elements on a web page. The hosts discuss the benefits of using layers, including addressing specificity issues and simplifying CSS authoring. They also cover the use of layers for controlling cascade order and managing legacy code during website redesigns. Understanding and implementing layers in CSS is emphasized as crucial for improved web development practices. Takeaways • Layering in CSS refers to the stacking order of elements on a web page and determines their visual display and interaction. • Using layers can address specificity issues and simplify CSS authoring. • CSS encapsulation and control of the cascade order can eliminate specificity issues and reduce the need for multiple overrides. • Defining layers ahead of time and specifying their order in the CSS file ensures correct application of styles. • Layers can be used to handle legacy code during website redesigns by wrapping it in a separate layer. • Important styles can override layers, and it is advised to find and replace or remove them to avoid conflicts. • Writing CSS in layers involves using layer names and nesting CSS inside them. • Inline styles have higher specificity than layers, and non-layered CSS takes precedence over layered CSS. • Nesting layers in CSS allows for greater control, organization, and avoidance of specificity issues. • Nesting layers can be used for various purposes, such as defining legacy layers, layouts, themes, and controlling the order of loading CSS.