waitForAvailableProcess.js

global.a = 0

let timer1 = setInterval(() => {
    global.a++
}, 1000)

const wait = (time) => {
    return new Promise((res, rej) => {
        setTimeout(res, time);
    })
}

const waitForAvailableProcess = async () => {
    let loopCount = 0
    while (1) {
        loopCount++
        if (global.a > 5) {
            clearInterval(timer1)
            break
        }
        console.log("loop:" + loopCount + ",a=" + global.a)
        await wait(400)
    }
}
waitForAvailableProcess()