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4 years ago
module.exports = thunkyp
function thunkyp (fn) {
let running = null
return ready
function ready () {
if (running) return running
const p = fn()
if (!(p instanceof Promise)) running = Promise.resolve(p)
else running = p
running.catch(onerror)
return running
}
function onerror () {
running = null
}
}