Easy-polling aims to achieve one simple and pure task:\ Check result of an asynchronous task until the result matched required criteria.\ This process is so called "polling" or "poll"!.
npm install easy-pollingjs
npm i easy-polling
`
`js
const poll = require("easy-polling");
const fnAsyncTask = async () => {
// Do some async task, like calling a webservice or API
// Return a result which contains state to be checked
// Using axios as an example
return await axios.get("http://domain/api");
}
const fnValidate = (result) => {
// Input parameter result is the return value of fnAsyncTask
// Check state, below example check if status equal to done
return result["status"] === "DONE";
};
// fnAsyncTask: Do some async task, it has a return value
// fnValidate: Check state of return value from above function, if true, return the value, otherwise keep polling
// Polling interval 1000ms
// Polling timeout 30000ms, which means if fnValidate returns false until timeout, polling return null
poll(fnAsyncTask, fnValidate, 1000, 30000).then(pollingResponse = > {
console.log(pollingResponse);
});
``