When should you change the page title for a Single Page Application (SPA)?

The page title for a Single Page Application (SPA) should be changed when the user navigates to a new URL using JavaScript because this is a key moment in the user experience and accessibility of the application. In SPAs, navigation typically occurs without a full page reload, and this can lead to confusion for users if the page title does not reflect the current context. By updating the title dynamically when the user navigates, you ensure that screen reader users and other assistive technology users receive accurate information about the current state of the application. This aligns with accessibility best practices, which advocate for real-time updates of relevant information to enhance the user's understanding and orientation within the application. Maintaining an accurate title helps users both visually and programmatically understand where they are within the SPA, thus improving overall usability and accessibility.