Why do I have to use this to save the timer variable, otherwise it will prompt Undefined.
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Originally both functions will use that variable, and the parallel functions have independent scopes. It must be mounted in a context that everyone can access, and this context is an instance of vue, which is this
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Originally both functions will use that variable, and the parallel functions have independent scopes.
It must be mounted in a context that everyone can access, and this context is an instance of vue, which is this