What is the relationship between PWA and single-page applications and webAPP?

what are PWA and single-page applications and webAPP respectively? they seem to be about the same. I"m a little confused. Can you give me a few examples?


Web App focuses on "function" and is an App implemented using web technology. Generally speaking, Web App runs on the web and standard browsers and develops applications with specific functions based on web technology. For example, Google search engine is a webApp, that has a specific function, so it can be called webapp
fromid=1157097&fromtitle=webapp" rel=" nofollow noreferrer "> https://baike.baidu.com/item/.

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PWA can be added to the home screen. Click the icon on the home screen to start the animation and hide the address bar to achieve offline caching. Even if the user's phone does not have a network, you can still use some offline features to achieve message push.
https://codeshelper.com/a/11.

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