JS 中的 SpeedCubing 秒錶
P粉014293738
P粉014293738 2023-09-14 09:13:21
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在程式碼區塊中內建了一個計時器。現在計時器透過按鈕啟動/停止,但我需要它在釋放空格按鈕時運行,並且我需要它在按下空格按鈕時停止。我已經嘗試解決這個問題大約兩天了,但似乎找不到解決方案。每次我嘗試停止計時器時,當我釋放空格按鈕時,計時器都會再次啟動。

let startDate;
let timeoutID = 0;
let time;
let started = false;
let timerRunOut = false;

function start(){
    if(!started){
        startDate = new Date();
        startTimer();
        started = true;
    }
}
function stop(){
    if(started){
        clearTimeout(timeoutID);
        started = false;
    }
}

function startTimer () {
    let current = new Date();
    time = (current - startDate);

    let timeMS = time;

    let ms = timeMS % 1000;
    timeMS = (timeMS - ms) / 1000;
    let seconds = timeMS % 60;
    timeMS = (timeMS - seconds) / 60;
    let mins = timeMS % 60;

    if(seconds < 10){
        document.getElementById("seconds").innerText = "0" + seconds;
    }else{
        document.getElementById("seconds").innerText = seconds;
    }

    if(mins > 0 && mins < 10){
        document.getElementById("minutes").innerText = "0" + mins + ":";
    }else if(mins > 0){
        document.getElementById("minutes").innerText = mins + ":";
    }else{
        document.getElementById("minutes").innerText = "";
    }

    if(ms < 10){
        document.getElementById("tens").innerText = "00" + ms;
    }
    else if(ms < 100){
        document.getElementById("tens").innerText = "0" + ms;
    }else{
        document.getElementById("tens").innerText = ms;
    }

    timeoutID = setTimeout(startTimer, 0);
}

我嘗試新增事件偵聽器並新增條件,但沒有任何效果,當計時器停止時,當我釋放空格按鈕時,它總是會再次啟動。

P粉014293738
P粉014293738

全部回覆(1)
P粉762730205

我找到了解決方案,我需要給 Andre 一點功勞,他幫我解決了問題這個出來了。

let spaceUp = 0;
function startHandler(event){
    if(event.code === "Space" && spaceUp < 1){
       start();
       spaceUp ++;
       document.addEventListener("keydown", stopHandler);
       document.removeEventListener("keyup", startHandler);
    
    }else if(spaceUp == 1){
        spaceUp = 0;
    }
    document.getElementById("timer").style.color = "black";
}
function stopHandler(event){
    if(event.code === "Space"){
        stop();
        document.removeEventListener("keydown", stopHandler);
        document.getElementById("timer").style.color = "red";
        document.addEventListener("keyup", startHandler);
    }
}

document.addEventListener("keyup", startHandler);

document.addEventListener("keydown", function(e){
    if(e.code === "Space" && !started){
        document.getElementById("timer").style.color = "green";
     }
})
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