How to use wait-on - 3 common examples
To help you get started, we’ve selected a few wait-on examples, based on popular ways it is used in public projects.
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universal-vue / uvue / tests / utils / cli.js View on Github 
const waitOnPromise = options => new Promise(resolve => waitOn(options, resolve));
const wait = time => new Promise(resolve => setTimeout(resolve, time));const { launchTimeout, protocol, host, port, waitOnScheme } = config
let url = ''
if (protocol === 'tcp' || protocol === 'socket') {
url = `${protocol}:${host}:${port}`
} else {
url = `${protocol}://${host}:${port}`
}
const opts = {
resources: [url],
timeout: launchTimeout,
...waitOnScheme,
}
try {
await waitOn(opts)
} catch (err) {
throw new JestDevServerError(
`Server has taken more than ${launchTimeout}ms to start.`,
ERROR_TIMEOUT,
)
}
}
}new Promise((resolve, reject) =>
waitOn(options, err => {
if (err) return reject(err);
resolve();
}),
);wait-on
wait-on is a cross platform command line utility and Node.js API which will wait for files, ports, sockets, and http(s) resources to become available
