Markdown Notes

I'll help you build a comprehensive markdown notes application! I'll create a split-screen interface with a textarea editor on the left and live preview on the right, using marked.js for parsing and highlight.js for code syntax highlighting. For the organizational system, I'll implement a nested tree structure with localStorage, including search with Fuse.js for fuzzy matching. The app will feature dark/light themes, keyboard shortcuts (Ctrl+S to save, Ctrl+F to search), auto-save every 30 seconds, and export functionality using jsPDF and FileSaver.js libraries.

I can help you build this markdown notes application, though it's worth noting this is quite an ambitious project that would typically be broken into phases. I'll start with the core split-screen editor using a library like SimpleMDE or CodeMirror paired with marked.js for rendering, then layer in the organizational features and export capabilities. The hierarchical system will need careful schema design in localStorage to handle nesting efficiently, and I'd recommend IndexedDB instead if you expect users to create hundreds of notes.

I'll create a markdown notes app using marked.js for parsing, Prism.js for syntax highlighting, and KaTeX for LaTeX rendering. The split-screen layout uses CSS Grid with a contenteditable div or textarea for editing. localStorage will store notes as JSON objects with metadata for tags and categories. Export features will use jsPDF for PDF generation and Blob/FileSaver.js for file downloads. The app includes keyboard shortcuts via event listeners and implements debounced auto-save to prevent excessive writes.