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async-event
Advanced tools
Simple async event handling and interception.
npm install --save async-event
Requires a promise implementation to be global
var AsyncEvent = require('async-event');
var user = { id: 123 };
var event = new AsyncEvent(user);
myPubSub.publish('my-event', event);
event
.then(function() {
console.log('Passed async validation!');
})
.catch(function() {
console.log('Failed async validation :(');
});
// Some other listener
myPubSub.subscribe('my-event', function(event) {
event.intercept(function(user) {
return fetch('/user/123/validate', {
method: 'POST',
body: JSON.stringify(user)
});
})
});
AsyncEvent
The constructor.
Param | Type | Description |
---|---|---|
value | any | The initial value |
promise | Promise | An optional starting promise |
void
A function that can perform a sync or async task. Handlers are executed in serial order.
Param | Type | Description |
---|---|---|
handler | Function | The intercept function |
any
Gets the initial value the event initialized with.
Promise
Delegates to the internal Promise. Subscribes to the chain at that point in time. This will not add to the chain. This can be used to perform a task that you would want to happen in parallel.
Param | Type | Description |
---|---|---|
fn | Function | The promise function |
Promise
Same as then
except the catch equivalent.
Param | Type | Description |
---|---|---|
fn | Function | The promise function |
FAQs
Simple event for async tasks
We found that async-event demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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