Select all that apply. Which of the following are examples of render-blocking resources?
- CSS files
- Large video files
- Font files
- JavaScript files
Explanation: Render-blocking resources are those that delay the rendering of a webpage until they are fully loaded and processed by the browser. Among the options provided, CSS files and JavaScript files are indeed examples of render-blocking resources. CSS files are crucial for styling the content of a webpage, and their absence or delay in loading can result in unstyled content being displayed to users, negatively impacting the visual presentation and user experience. Similarly, JavaScript files contain code that can manipulate the HTML content, modify the DOM structure, or handle user interactions, and their execution may affect how the page is rendered or displayed. Therefore, both CSS and JavaScript files are considered render-blocking resources because the browser must wait for them to be fetched, parsed, and executed before it can proceed with rendering the webpage. On the other hand, large video files and font files are not necessarily render-blocking resources. While large video files may impact page load times and performance, they typically do not block the rendering of HTML content. Similarly, font files may affect the visual appearance of text on the page, but they do not inherently delay the rendering process. Therefore, selecting CSS files and JavaScript files as examples of render-blocking resources accurately identifies the resources that can delay the rendering of a webpage until they are fully loaded and processed by the browser.