[英]What's difference between Promise.reject(error) and return error in Axios?
I have a general query about Axios and Promises.我有一个关于 Axios 和 Promises 的一般查询。 Maybe someone can help me clear this concept.
也许有人可以帮助我清除这个概念。
Basic Interceptor of Axios includes: Axios的基本拦截器包括:
// Add a response interceptor
axios.interceptors.response.use(function (response) {
// Any status code that lie within the range of 2xx cause this function to trigger
// Do something with response data
return response;
}, function (error) {
// Any status codes that falls outside the range of 2xx cause this function to trigger
// Do something with response error
return Promise.reject(error);
});
My question is what's the difference between returning error as我的问题是返回错误有什么区别
Project.reject(error);
and as并作为
return error;
This response and error goes to the Request 'then' amd 'catch' blocks respectively I believe.我相信,此响应和错误分别转到 Request 'then' amd 'catch' 块。 But what's the difference if we use Promise.resolve and Promise.reject?
但是如果我们使用 Promise.resolve 和 Promise.reject 有什么区别呢?
I just tried (it's that easy ) and the difference is that by returning a rejected promise ( return Promise.reject(error)
), you tell axios
that the response has an error condition and that the upstream code should be notified about it ( axios(…).catch(…)
will trigger).我刚刚尝试过(就这么简单),不同之处在于通过返回被拒绝的 promise(返回
axios(…).catch(…)
return Promise.reject(error)
),您告诉axios
axios(…).catch(…)
将触发)。
When returning just the error ( return error
), you're telling axios
to basically ignore the error and the upstream code will not know about it ( axios(…).then(…)
will trigger).当只返回错误(
return error
)时,您是在告诉axios
基本上忽略该错误并且上游代码不会知道它( axios(…).then(…)
将触发)。
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