Vue changes the content of the page, sometimes partial refresh, sometimes full refresh?

phenomenon: the development of the project based on the vue+element-ui, editor webstorm, project is perfectly normal, but every time you change a little html style, or text, ctrl+s, the page is refreshed. But this is not the case before, before to change a little text, pages such as css will not be refreshed, only a partial refresh.
the official website explains hot overloading: "hot overloading" is not simply reloading the page when you modify the file. When hot reloading is enabled, when you modify the .vue file, all instances of the component are replaced and there is no need to refresh the page. It even maintains the current state of the application and the components being replaced! This greatly improves the development experience when you adjust the template or modify the style.
normally, add an exclamation point and refresh the page partially.
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