Mock window object is common in some ssr program for compatibility

I would say it's the opposite: Mocking the window object in Node.js is mostly done for testing but should be avoided as it will break many universal libraries relying on that check.
Checking typeof navigator is another possibility

@posva yeah，i will remove window dependencies in next version，but many third party ui component depend on window property and the code maybe not be written in component lifecycle but component top.

Navigator also be mocked commonly. window.htmlelememt looks like a safe condition

Mock window object is common in some ssr program for compatibility

I would say it's the opposite: Mocking the window object in Node.js is mostly done for testing but should be avoided as it will break many universal libraries relying on that check. Checking typeof navigator is another possibility

emmm，mock navigator.useragent is also common，what’s your opinion about the judge condition