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This script contains a series of functions primarily aimed at handling text overflow and device/browser detection for better content display and compatibility across different devices and browsers.

Text Overflow

The textOverflow function is designed to truncate text content when it exceeds the element's boundary, adding an ellipsis or custom HTML to indicate overflow. The script calculates the number of lines in the element, compares it with a predefined line clamp value, and performs binary search to find the cut-off point for the text within the DOM tree. It updates the element with the truncated content and the specified overflow indicator.

Device and Browser Detection

The detect function parses the user agent string to identify various properties of the browser and operating system, such as versions and specific features. It can determine whether the device is running on iOS, Android, Windows, Mac OS, or Linux and detect the presence of different browsers like Chrome, Firefox, Safari, etc. Additionally, it contains methods to check for support of HTML5 video, autoplay functionality, and lockdown mode in iOS.

Content Description Handling

The script includes a function __setDesc to manipulate the description of content based on its type, such as video or audio. It can sanitize and format the description, handle the encoding, and manage links within the content. It also provides functionality to expand or collapse long text content with a folder switcher for a better user experience.

Utilities

Additional utility functions are present for comparing versions, getting platform information, and determining specific conditions like being within a WeChat environment or Google Play restrictions. These utilities can be used to tailor the user experience or functionality based on the environment in which the content is being accessed.