Debugging with Console & DevTools

The $0 variable is a powerful DevTools reference: 1) It automatically references the DOM element currently selected in the Elements panel, 2) This provides a direct way to access and manipulate the selected element from the console, 3) It eliminates the need for document.querySelector() to access elements you're inspecting, 4) The browser maintains a history of your recent selections with $1, $2, $3, and $4 referencing previously selected elements, 5) This allows quick testing of properties and methods on specific DOM elements, 6) It's especially useful for prototyping DOM manipulations directly in the console, 7) Combined with console.dir($0), it provides an interactive way to explore element properties, 8) This feature significantly speeds up the debugging workflow when investigating DOM-related issues.