Response delay

You can control how long a route takes to respond either statically, through the third settings argument, or dynamically from a resolver with setDelay. Both hold the response for the given number of milliseconds before it is sent.

Delay As A Setting

For a fixed delay on the whole route, set delay in settings.

rest.get('/users', [{ id: 1, name: 'John' }], {
  delay: 500
});

Here every GET /users request takes at least 500ms to respond. This is the simplest way to describe a consistently slow route.

Delay From A Resolver

When the delay depends on the request, call setDelay inside a resolver. It returns a promise, so await it before responding.

rest.get('/users', async ({ setDelay }) => {
  await setDelay(500);
  return [{ id: 1, name: 'John' }];
});