JavaScript DOM Manipulation Prompt

Please provide JavaScript code to interact with and manipulate the DOM based on my requirements. I need code that's clean, efficient, and follows modern best practices. DOM MANIPULATION REQUIREMENTS: - Task: [DESCRIBE WHAT YOU WANT TO ACHIEVE] - Target elements: [SPECIFIC ELEMENTS TO MANIPULATE] - Actions needed: [WHAT CHANGES TO MAKE] - Event handling: [USER INTERACTIONS TO RESPOND TO] - Browser compatibility: [BROWSER SUPPORT REQUIREMENTS] Please provide: 1. COMPLETE JAVASCRIPT CODE * Clean, well-structured code * Modern DOM manipulation methods * Proper event handling * Error handling where appropriate * Comments explaining complex parts * Performance considerations 2. HTML CONTEXT * Sample HTML structure the code works with * Any required HTML attributes or organization * CSS classes needed for the manipulation 3. IMPLEMENTATION APPROACH * Explanation of your DOM selection method * Reasoning behind manipulation techniques chosen * Event delegation if appropriate * Handling browser inconsistencies 4. ALTERNATIVE APPROACHES * Different ways to accomplish the same task * Tradeoffs between methods * jQuery alternative (if relevant) * Framework-specific approach (React, Vue, etc. if relevant) 5. BEST PRACTICES APPLIED * Performance optimizations * Accessibility considerations * Security precautions (if applicable) * Code organization recommendations * Debugging suggestions Please provide code that is ready to use and follows modern JavaScript best practices. Ensure it's well-commented to explain the approach and any non-obvious parts.