const servlet = (qs = '') => new Promise((resolve) => $.get(`myservlet${qs}`, {}, resolve, 'json'))

const chain = (data) => servlet(`?chain=${data.expected}`)

const tap = (effect) => (data) => {
    effect(data)
    return data
}

const show = (data) => console.info(data)

const logger = ({ steps }) => console.log(`Number of steps advanced is ${steps}`)

servlet()
    .then(tap(show))
    .then(chain)
    .then(tap(show))
    .then(chain)
    .then(tap(show))
    .then(chain)
    .then(tap(show))
    .then(chain)
    .then(tap(logger))
    .then(tap(show))