The most commonly used JavaScript effect on the Web is the image rollover. For the one person with access to the Web who’s never seen one before, an image rollover happens when you move your ...

JavaScript is the second-largest contributor to page weight, behind images, which means it can play a major role ... As the W3C gradually add these features to the HTML or CSS standards and they are ...

In this example, lazy loading prevented Google from seeing the images on the page ... the right content. JavaScript has made it more complicated, in that it can add, remove or change different ...