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+const delay = ms => new Promise(ok => setTimeout(() => ok(ms), ms))
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+
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+//trafficLight
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+//1stage
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+// let trafficLightContent = document.createElement('div')
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+// let signals = document.createElement('div')
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+// let red = document.createElement('img')
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+// let yellow = document.createElement('img')
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+// let green = document.createElement('img')
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+// signals.append(red)
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+// signals.append(yellow)
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+// signals.append(green)
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+
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+// trafficLightContent.append(signals)
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+// document.body.append(trafficLightContent)
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+// red.hidden = 'true'
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+// yellow.hidden = 'true'
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+// green.hidden = 'true'
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+
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+// red.src = 'img/red.png'
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+// red.style.width = '300px'
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+// red.style.position = 'relative'
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+// red.style.right = '31px'
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+
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+// yellow.src = 'img/yellow.png'
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+// yellow.style.width = '190px'
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+// green.src = 'img/green.png'
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+// green.style.width = '200px'
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+// green.style.position = 'relative'
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+// green.style.right = '5px'
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+// green.style.top = '-5px'
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+
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+// async function trafficLight(){
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+// while (true){
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+// redColor()
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+// await delay(5000)
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+// yellowColor()
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+// await delay(3000)
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+// greenColor()
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+// await delay(5000)
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+// }
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+// }
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+
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+
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+// function cleaner () {
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+// red.hidden = 'true'
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+// yellow.hidden = 'true'
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+// green.hidden = 'true'
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+// }
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+
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+// function redColor() {
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+// cleaner()
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+// red.removeAttribute('hidden')
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+// }
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+
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+// function yellowColor(){
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+// cleaner()
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+// yellow.removeAttribute('hidden')
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+// }
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+
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+// function greenColor () {
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+// cleaner()
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+// green.removeAttribute('hidden')
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+// }
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+
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+// trafficLight()
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+
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+//2stage
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+
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+//dom
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+let trafficLightContent = document.createElement('div')
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+let signals = document.createElement('div')
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+let signalsPed = document.createElement('div')
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+let btnContent = document.createElement('div')
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+let br = document.createElement('br')
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+btnContent.style.marginTop = '90px'
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+signalsPed.style.marginTop = '100px'
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+let red = document.createElement('img')
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+let yellow = document.createElement('img')
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+let green = document.createElement('img')
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+let greenPed = document.createElement('img')
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+greenPed.style.width = '180px'
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+let redPed = document.createElement('img')
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+redPed.style.width = '180px'
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+greenPed.src = 'img/greenped.png'
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+greenPed.hidden = 'true'
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+greenPed.style.marginLeft = '10px'
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+redPed.src = 'img/redped.png'
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+let btn = document.createElement('button')
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+btn.innerHTML = 'I want to cross <br \/> the pedestrian <br \/> crossing'
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+signals.append(red)
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+signals.append(yellow)
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+signals.append(green)
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+btnContent.append(btn)
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+signalsPed.append(greenPed)
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+signalsPed.append(redPed)
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+
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+//btnsettings
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+btn.style.backgroundColor = 'red'
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+btn.style.border = '2px solid black'
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+btn.style.color = 'white'
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+btn.style.padding = '20px'
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+btn.style.textAlign = 'center'
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+btn.style.textDecoration = 'none'
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+btn.style.display = 'inline-block'
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+btn.style.fontSize = '16px'
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+btn.style.cursor = 'pointer'
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+btn.style.borderRadius = '100%'
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+btn.style.marginLeft = '20px'
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+//btnsettingsend
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+
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+trafficLightContent.append(signals)
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+trafficLightContent.append(btnContent)
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+trafficLightContent.append(signalsPed)
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+document.body.append(trafficLightContent)
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+red.hidden = 'true'
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+yellow.hidden = 'true'
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+green.hidden = 'true'
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+
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+red.src = 'img/red.png'
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+red.style.width = '300px'
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+red.style.position = 'relative'
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+red.style.right = '31px'
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+
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+yellow.src = 'img/yellow.png'
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+yellow.style.width = '190px'
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+green.src = 'img/green.png'
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+green.style.width = '200px'
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+green.style.position = 'relative'
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+green.style.right = '5px'
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+green.style.top = '-5px'
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+
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+//functions
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+function randTime(min, max) {
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+ min = Math.ceil(min);
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+ max = Math.floor(max);
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+ return Math.floor(Math.random() * (max - min)) + min; //Максимум не включается, минимум включается
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+ }
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+
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+async function trafficLight(color, time){
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+ while (true){
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+ onColor(green)
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+ let p = Promise.race([
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+ new Promise((resolve,reject)=>{resolve(delay(5000))}),
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+ new Promise((resolve,reject)=>{resolve(domEventPromise(btn,'click'))}),
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+ ])
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+ await p
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+ onColor(yellow)
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+ await delay(time = 3000)
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+ onColor(red)
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+ await delay(time = randTime(3000,10000))
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+ onColor(yellow)
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+ await delay(time = randTime(3000,5000))
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+ disabler()
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+ }
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+}
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+
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+const disabler = btn.onclick = function() {
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+ btn.disabled = true
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+ setTimeout(function() {
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+ btn.disabled = false
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+ }, 20000);
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+};
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+
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+const domEventPromise = function (element , eventName){
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+ return new Promise (function (resolve, reject) {
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+ let someObject
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+ element.addEventListener(eventName , someObject = (event) =>{
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+ resolve(event)
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+ element.removeEventListener(eventName,someObject)
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+ } )
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+ })
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+}
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+
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+function cleaner () {
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+ red.hidden = 'true'
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+ yellow.hidden = 'true'
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+ green.hidden = 'true'
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+ greenPed.hidden = 'true'
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+ redPed.removeAttribute('hidden')
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+}
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+
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+function onColor (color) {
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+ cleaner()
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+ if (color === green) {
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+ green.removeAttribute('hidden')
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+ }
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+ else if (color === yellow) {
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+ yellow.removeAttribute('hidden')
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+ }
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+ else if(color === red){
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+ red.removeAttribute('hidden')
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+ redPed.hidden = 'true'
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+ greenPed.removeAttribute('hidden')
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+ }
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+}
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+
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+trafficLight()
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+
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+//speedtest
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+// async function speedtest(getPromise, count ,parallel=1){
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+ // let duration
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+// let querySpeed
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+// let queryDuration
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+// let parallelSpeed
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+// let parallelDuration
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+
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+
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+// let t0 = performance.now()
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+// for (let i = 0; i < count; i++){
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+// let promiseArr = []
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+// for (let all = 0;all < parallel;all++){
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+// promiseArr.push(getPromise())
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+// }
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+// await Promise.all(promiseArr)
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+// console.log(promiseArr)
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+// }
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+// let t1 = performance.now()
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+
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+// duration = t1-t0
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+// parallelSpeed = count*parallel / duration
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+// parallelDuration = 1/parallelSpeed
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+// queryDuration = duration/count
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+// querySpeed = 1/queryDuration
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+
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+// return {
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+// duration,
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+// querySpeed, //средняя скорость одного запроса
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+// queryDuration, //
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+// parallelSpeed,
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+// parallelDuration
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+// }
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+// }
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+
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+// // speedtest(() => delay(1000), 10, 10 ).then(result => console.log(result))
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+// // {duration: 10000,
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+// // querySpeed: 0.001, //1 тысячная запроса за миллисекунду
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+// // queryDuration: 1000, //1000 миллисекунд на один реальный запрос в среднем
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+// // parallelSpeed: 0.01 // 100 запросов за 10000 миллисекунд
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+// // parallelDuration: 100 // 100 запросов за 10000 миллисекунд
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+// speedtest(() => fetch('http://swapi.dev/api/people/1').then(res => res.json()), 10, 5).then(result => console.log(result))
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Vadym Hlushko
