解决'Can't find variable: host' 错误：微信小程序开发常见问题

This error message indicates that the variable 'host' is not defined in the current scope or context. It is likely that the code is trying to use this variable to access a host or server, but it cannot find the value of the variable. To fix this error, you need to define the 'host' variable or ensure that it is properly imported or passed as a parameter to the current scope.