我創建了一個音量減小按鈕，我試圖防止音量低于 0.0。由于某種原因，Math.max 無法正常工作。通過檢查當前值/時間不確定我做錯了什么。如何添加一個邏輯，即如果音量等于 0.0 則返回并且不執行任何操作？請參閱 -> 向下箭頭鍵代碼 40。(() => {    const audio = document.querySelector('audio');    const playButton = document.getElementById('play');    const progress = document.querySelector('.player__progress');    const progressBar = document.querySelector('.player__progress__inner');    const next = document.getElementById('next');    const prev = document.getElementById('previous');    const title = document.querySelector('.title');    const status = document.querySelector('.status');    const poster = document.querySelector('.player__image');    if (!audio) {        return;    }    // On play button click.    const onPlayStart = () => {        audio.paused ? audio.play() : audio.pause();    };    // On audio playing.    const onPlaying = () => {        playButton.innerHTML = `<i class="fas fa-pause"></i>`;        // Change title if is currently playing.        // status.innerText = `status: Wordt afgespeeld.`;    };    // On audio paused.    const onPaused = () => {        playButton.innerHTML = `<i class="fas fa-play"></i>`;        // Change title if is currently paused.        // status.innerText = `status: Is gepauzeerd.`;    };    // Update progress bar    const onTimeUpdate = () => {        const percent = (audio.currentTime / audio.duration) * 100;        progressBar.style.width = `${percent}%`;    };    // Update progress on click    const onProgressUpdate = (e) => {        audio.currentTime = (e.offsetX / progress.clientWidth) * audio.duration;    };    const onKeyPress = (e) => {        e.preventDefault();        // Spacebar        if (e.keyCode === 32) {            audio.paused ? audio.play() : audio.pause();        }        // Right arrow        if (e.keyCode === 39) {            // Forward by 10 sec.            audio.currentTime += 10;        }