UI design does not inherently require coding skills, but having a basic understanding of coding can be beneficial. Many UI designers focus primarily on visual design, user experience (UX), and the overall layout of interfaces, which can be accomplished with design tools without writing code.
However, familiarity with HTML, CSS, and JavaScript can enhance a UI designer's effectiveness, especially when collaborating with developers or creating interactive prototypes. Knowledge of coding allows designers to communicate design intentions more clearly and understand technical constraints better.
In summary, while coding is not strictly necessary for UI design, it is a valuable skill that can improve collaboration and understanding within a development team.