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@avocode/cancel-token
Advanced tools
A method for making async operations cancellable
Component:
$ component install ForbesLindesay/cancellation
NPM:
$ npm install cancellation
Returns a new CancellationTokenSource:
var tokenSource = require('cancellation');
var source = tokenSource();
callAsyncOperation(arg1, arg2, arg3, source.token);
setTimeout(function () {
source.cancel('Operation timed out');
}, 1000);
Returns an 'empty' CancellationToken (one that will never be cancelled).
var tokenSource = require('cancellation');
function asyncOperation(arg1, arg2, arg3, cancellationToken) {
cancellationToken = cancellationToken || tokenSource.empty;
//Continue with function knowing there is a cancellation token
}
Returns true if the token has been cancelled:
//In ES6
function asyncOperation(cancellationToken) {
return spawn(function* () {
while(!cancellationToken.isCancelled()) {
yield NextAsyncOp();
}
})
}
Throws the rejection reason if the token has been cancelled:
//In ES6
function asyncOperation(cancellationToken) {
return spawn(function* () {
while(true) {
cancellationToken.throwIfCancelled()
yield NextAsyncOp();
}
})
}
Calls cb when the cancellation token is cancelled (this is probably currently the most useful of these methods).
function get(url, cancellationToken) {
var def = defer();
var req = request(url, function (err, res) {
if (err) def.reject(err);
else def.resolve(res);
});
cancellationToken
.onCancelled(function (reason) {
def.reject(reason);
req.abort();
});
return def.promise;
}
MIT
FAQs
A method for making async operations cancellable
The npm package @avocode/cancel-token receives a total of 24 weekly downloads. As such, @avocode/cancel-token popularity was classified as not popular.
We found that @avocode/cancel-token demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 18 open source maintainers collaborating on the project.
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