This example demonstrates a minimal HTML page that uses plain JavaScript to insert dynamic text into a paragraph element. The code selects the paragraph with `document.querySelector` and sets its content, showing how basic DOM manipulation works with JavaScript. The page uses no external libraries, relying only on native browser APIs, and is structured as a simple starter template with an HTML file and a separate `main.js` script. The rendered output is a single line of text updated by the script, illustrating the core pattern of client-side scripting without additional frameworks.