问题
What are the different paramMap and queryParamMap?
Angular website says paramMap - An Observable that contains a map of the required and optional parameters specific to the route. The map supports retrieving single and multiple values from the same parameter.
queryParamMap - An Observable that contains a map of the query parameters available to all routes. The map supports retrieving single and multiple values from the query parameter.
I would like to know when I have to use with examples.
Thanks
回答1:
ParamMap for routes like user/:id. Id param belongs only this route.
QueryParamMap is for eg. user/:id?tab=edit. Tab is a global query param, it can be read from the ActivatedRoute in the user route's component as well as any of its ancestors.
来源：https://stackoverflow.com/questions/49615857/angular-parammap-vs-queryparammap