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⚠️ This is the archived documentation for k6 v0.44. Go to the latest version.

Socket.setTimeout(callback, delay)

A module with a better and standard API exists

The new k6/experimental/websockets API partially implements the WebSockets API living standard.

When possible, we recommend using the new API. It uses a global event loop for consistency with other k6 APIs and better performance.

Call a function at a later time, if the WebSocket connection is still open then.

callbackfunctionThe function to call when delay has expired.
delaynumberThe delay time, in milliseconds.


import ws from 'k6/ws';
import { sleep } from 'k6';
export default function () {
console.log('T0: Script started');
const url = 'ws://';
const response = ws.connect(url, null, function (socket) {
console.log('T0: Entered WebSockets run loop');
socket.setTimeout(function () {
console.log('T0+1: This is printed');
}, 1000);
socket.setTimeout(function () {
console.log('T0+2: Closing socket');
}, 2000);
socket.setTimeout(function () {
console.log('T0+3: This is not printed, because socket is closed');
}, 3000);
console.log('T0+2: Exited WebSockets run loop');
console.log('T0+4: Script finished');