Is classified by two other subjects (perhaps the Background type and the Novice User role)?

按其他两个主题进行分类(可能是background类型和Novice User角色)？

youdao

Since it cannot be retrieved in the specified waiting period, a pop-up window informs the user about the background processing.

因为在指定的等待周期内无法获取它，一个弹出式窗口告诉用户获取操作在后台继续执行。

youdao

Therefore, the HTTP requests can be made and responses received completely in the background and without the user experiencing any visual interruptions.

因此，可以在后台发出HTTP请求和接收响应，而不会给用户造成任何视觉上的干扰。

youdao

These actions can occur in the background while the user is seeing what appears to be a normal, harmless web page.

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From then on, any time the user clicks on a Web site, program or database that requires its own user ID and password, the software issues the proper credentials, all in the background, without the user having to lift a finger or remember a word.

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Web Workers, for instance, is an emerging system for isolating a browser's individual tasks into separate "threads, " making it easier for a browser-based program to perform a computationally intensive task such as photo-editing in a background tab while the user is attending to something else, like e-mail, in the foreground.

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