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7627302052023-09-15 00:51:03
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"; } })