This article mainly introduces JavaScript to implement the example code of refreshing the progress bar of the web page header. It is very good and has reference value. Friends who need it can refer to this article. The header will appear when refreshing, because it is not really involved in browsing. Whether the browser loading is complete depends on the rendering process, so it is just an appearance. It does not mean that the browser has finished loading the resources after the display is completed. Rendering: Take a look at the html first: just two tags
CSS: The layout is also very simple