操作

你可以通过定义一个 graphql.operation() 处理程序并通过操作名称匹配来拦截任何 GraphQL 操作，无论其类型如何。与查询和突变处理程序不同，操作处理程序不需要你指定操作类型或名称，只需指定响应解析器即可。

¥You can intercept any GraphQL operation regardless of its kind by defining a graphql.operation() handler. Unlike query and mutation handlers, the operation handler does not require you to specify the operation kind or name, only the response resolver.

graphql.operation(() => {})

你仍然可以访问被拦截的 GraphQL 操作的所有 响应解析器参数，例如 operationName、variables 等。

¥You can still access all the Response resolver arguments of the intercepted GraphQL operation, like operationName, variables, etc.

当你想将请求处理委托给外部源（例如模拟的 GraphQL 模式）时，这种类型的拦截非常方便。有关详情，请参阅 Schema 优先模拟。

¥This type of interception is handy when you want to delegate the request handling to an external source, like a mocked GraphQL schema. For that, see Schema-first mocking.