This section comprehends the next files in section 2-ui:
├── 1-document
│   ├── 01-browser-environment
│   ├── 02-dom-nodes
│   ├── 03-dom-navigation
│   ├── 04-searching-elements-dom
│   ├── 05-basic-dom-node-properties
│   ├── 06-dom-attributes-and-properties
│   ├── 07-modifying-document
│   ├── 08-styles-and-classes
│   ├── 09-size-and-scroll
│   ├── 10-size-and-scroll-window
│   ├── 11-coordinates
│   └── index.md
├── 2-events
│   ├── 01-introduction-browser-events
│   ├── 02-bubbling-and-capturing
│   ├── 03-event-delegation
│   ├── 04-default-browser-action
│   ├── 05-dispatch-events
│   └── index.md
├── 3-event-details
│   ├── 1-mouse-events-basics
│   ├── 10-onload-ondomcontentloaded
│   ├── 11-onload-onerror
│   ├── 3-mousemove-mouseover-mouseout-mouseenter-mouseleave
│   ├── 4-mouse-drag-and-drop
│   ├── 5-keyboard-events
│   ├── 8-onscroll
│   └── index.md
├── 4-forms-controls
│   ├── 1-form-elements
│   ├── 2-focus-blur
│   ├── 3-events-change-input
│   ├── 4-forms-submit
│   └── index.md
└── index.md