{isDesktopCollapsed && ( setIsDesktopCollapsed(false)} className="hidden @sm:flex w-9 h-9 items-center justify-center rounded-lg hover:bg-neutral-100 dark:hover:bg-[#2A2A2A] text-neutral-500 transition-colors outline-none" > )} React Component Optimization

You

Can you help me optimize the re-renders in my sidebar component? It's currently redrawing the entire tree when a single folder is toggled.

Nexus AI

Absolutely. The issue occurs because the state that tracks expanded folders is held at the root of the file tree component, causing a full re-render on every state change.

We can optimize this by using `React.memo` for the individual folder nodes, or by refactoring the state to only trigger updates on the specific nodes being toggled. Here is an optimized approach:

typescript

                    
                      const FolderNode = React.memo(({ node, onToggle }) => {{'\n'}
                      {'  '}return ({'\n'}
                      {'    '}<div onClick={() => onToggle(node.id)}>{'\n'}
                      {'      '}{node.name}{'\n'}
                      {'    '}</div>{'\n'}
                      {'  '});{'\n'}
                      });

<button className="p-2 m-1.5 bg-indigo-500 hover:bg-indigo-600 text-white rounded-xl transition-colors outline-none shrink-0">
                <Send className="w-4 h-4" />
              </button>
            </div>
            <p className="text-center text-[10px] text-neutral-400 mt-2">
              Nexus AI can make mistakes. Consider verifying important information.
            </p>
          </div>
        </div>
      </main>

<AnimatePresence>
        {isMobileMenuOpen && (
          <motion.div
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            className="@sm:hidden absolute inset-0 bg-black/60 backdrop-blur-sm z-40"
            onClick={() => setIsMobileMenuOpen(false)}
          />
        )}
      </AnimatePresence>

<AnimatePresence>
        {isMobileMenuOpen && (
          <motion.div
            initial={{ x: "-100%" }}
            animate={{ x: 0 }}
            exit={{ x: "-100%" }}
            transition={{ type: "spring", bounce: 0, duration: 0.3 }}
            className="@sm:hidden absolute inset-y-0 left-0 w-[280px] bg-[#F9F9F9] dark:bg-[#171717] z-50 shadow-2xl flex flex-col"
          >
            <button 
              onClick={() => setIsMobileMenuOpen(false)}
              className="absolute top-3 right-3 w-8 h-8 flex items-center justify-center rounded-lg bg-white dark:bg-[#212121] border border-neutral-200 dark:border-[#333] text-neutral-500 z-50"
            >
              <X className="w-4 h-4" />
            </button>
            <SidebarContent />
          </motion.div>
        )}
      </AnimatePresence>