js每隔一秒打印1,2,3,4,5

[Sunny-117]

[hyxieshi]

function delay(i) { return new Promise((res) => { setTimeout(() => { console.log(i); res(); }, 1000); }); } async function tim() { for (let i = 1; i < 6; i++) { await delay(i); } } tim()

[yuxinye65]

for(let i=1;i<6;i++){ setTimeout(() => { console.log(i) },i*1000) }

[LifeIsTerrible]

function delayLog(str) {
    return new Promise((resolve, _) => {
        setTimeout(() => {
            console.log(str);
            resolve()
        }, 1000);
    })
}
async function time() {
    for (let i = 1; i <= 5; i++) {
        await delayLog(i)
    }
}
time();

[Pcjmy]

function print(x) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log(x);
      resolve();
    }, 1000)
  })
}

function solve() {
  print(1)
    .then(() => {
      return print(2)
    })
    .then(() => {
      return print(3)
    })
    .then(() => {
      return print(4)
    })
    .then(() => {
      return print(5)
    })
}

solve();

[bearki99]

function delay(i) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log(i);
      resolve();
    }, 1000);
  });
}
async function generate() {
  for (let i = 1; i <= 5; i++) {
    await delay(i);
  }
}
generate();

[2239351258]

let 块级作用域

for (let i = 1; i <= 5; i++){
  setTimeout(()=>console.log(i),i*1000)
}

var+闭包

setTimeout传参

for (var i = 1; i <= 5; i++){
  setTimeout((i)=>console.log(i),i*1000,i)
}

闭包传参

for (var i = 1; i <= 5; i++){
  ((j)=>setTimeout(()=>console.log(j),j*1000))(i)
}

Promise

const delayPrint = (delay, ...args) => {
  return new Promise((res, rej) => {
    setTimeout(() => {
      console.log(...args)
      res()
    },delay)
  })
}
(async () => {
  for (let i = 1; i <= 5; i++){
    await delayPrint(1000,i)
  }
})()

[CHJ30]

let a=1 let x = setInterval(()=>{ console.log(a++) if(a===6){ clearInterval(x) x = null } },1000)

[xianjianlf2]

function intervalPrint() {
    let count = 0
    var interval = setInterval(function () {
        count++
        if (count === 5) {
            clearInterval(interval)
        }
        console.log(count)
    }, 1000)

    return interval
}

intervalPrint()

// promise
function intervalPrintPromise() {
    return new Promise(resolve => setTimeout(resolve, 1000))
}
async function print() {
    for (let number = 1; number <= 5; number++) {
        await intervalPrintPromise(number).then(() => console.log(number))
    }
}

print()