What is the preloading mechanism of Uniapp?

The preloading mechanism in Uniapp refers to loading specified resources in advance during the application initialization phase to improve the startup speed and user experience.

Specifically, UniApp’s preloading mechanism is divided into two stages: initial screen preloading and delayed preloading.

Preloading the initial screen refers to loading the necessary resources such as page files, components, and static assets ahead of time when the application is launched. This way, when users access the initial screen, the required resources have already been loaded in advance, reducing page loading time and enhancing user experience.

Delayed preloading refers to the process of loading the necessary resources for other pages based on user behavior and demand, after the user has accessed the initial screen. For example, when a user clicks on a link or button, the resources required for that specific page are loaded based on the corresponding page path. Delayed preloading can improve the response speed when users access other pages and reduce their waiting time.

In general, the preloading mechanism of UniApp improves the speed of application startup and user experience by efficiently loading the necessary resources in advance. Additionally, it can dynamically load resources needed for other pages based on user behavior and requirements, further enhancing the responsiveness when users access those pages.