A web page that supports reading mode usually needs to meet the following conditions: Reading mode switch: There is usually a reading mode switch on the webpage that allows the user to choose whether to turn on the reading mode. If the webpage does not have a reading mode switch, you may need to install a reading mode plug-in in the website. 2. Reading mode rendering method: Reading mode usually requires a special rendering method to present the text content. For example, the reading mode rendering method in HMTL5 could be implemented through the <reading mode> tag. The reading mode rendering method supports a variety of text rendering methods such as font, font size, color, line spacing, etc. 3. Reading Mode Protection: Some websites need to protect the user's privacy so that the user cannot access or modify their content. In this case, the webpage may need to implement a reading mode protection function to prevent users from accessing or modifying the webpage content without authorization. 4. Reading mode plug-in: If the webpage does not have a reading mode switch or rendering method, you may need to install a reading mode plug-in to implement the reading mode function. Reading mode plug-ins can be installed in the browser or implemented using Web application development techniques. Webpages that supported reading mode needed to have a reading mode switch, rendering method, protection function, reading mode plug-in, and other technical means to allow users to read the content of the webpage comfortably.