By using the navigator.useragent property, you can get the User-Agent string of the current browser, so that the type and version of the current browser, as well as the type and version of the operating system, can be identified in JavaScript.
navigator.useragent is a property in JavaScript that is used to return the User-Agent string of the current browser.
User-Agent is a string sent in the HTTP request header to identify the client's browser and operating system information. Depending on the browser and operating system, the User-Agent string will be different.
By using the navigator.useragent property, you can get the User-Agent string of the current browser, so that the type and version of the current browser, as well as the type and version of the operating system, can be identified in JavaScript.
This is useful for developers because different processing logic can be adapted according to different browsers and operating systems to ensure that web pages can display and work correctly in various environments.
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