cancelable-fetch
v1.0.0
Published
Makes a fetch cancelable
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cancelable-fetch
Makes a fetch cancelable.
Usage
cancelable-fetch wraps an existing fetch and adds a cancel
method.
Only the headers will be fetched if the response body of fetch supports cancel
.
The request can't be canceled before, because the fetch interface doesn't provide a method for it.
In any case, if cancel
was called, an user cancelation error will be thrown.
The Promise standard doesn't support cancel
.
Therefore always use the return value of cancelable-fetch, because cancel
will not be forwarded in the Promise chain!
Example
In this example doRequest
takes care that only the latest request will respond.
var cancelableFetch = require('cancelable-fetch')
var request = null
function doRequest () {
// check if there is a running request
if (request) {
// cancel that request
request.cancel()
}
// wrap the new request with cancelableFetch
request = cancelableFetch(fetch(url)).then(function (res) {
// remove running request
request = null
// forward response
return res
})
return request
}