[js][css] 分享一个类语雀代码块折叠 JS

.code-block {
  position: relative;
  margin: 1.5rem 0;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  overflow: hidden;
  z-index: 1;
  background-color: #f5f5f5;
  padding: 1rem;
  border: 2px solid transparent;
}

@keyframes neon-border {
  0% { border-color: #ff0080; box-shadow: 0 0 5px #ff0080; }
  25% { border-color: #00ffff; box-shadow: 0 0 5px #00ffff; }
  50% { border-color: #00ff00; box-shadow: 0 0 5px #00ff00; }
  75% { border-color: #ffff00; box-shadow: 0 0 5px #ffff00; }
  100% { border-color: #ff0080; box-shadow: 0 0 5px #ff0080; }
}

.code-block:hover:not([data-fullscreen="true"]) {
  animation: neon-border 5s infinite;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  z-index: 10;
}

.code-block pre {
  margin: 0;
  padding: 0;
}

.code-block-header .code-block-title {
  font-weight: 500;
}

.theme-dark .code-block {
  background-color: #1e1e1e;
  color: #d4d4d4;
}

.code-block .protyle-action {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.code-block:hover .protyle-action {
  opacity: 1;
}

.code-block[data-fullscreen="true"] {
  border: none;
  animation: none;
  transform: none !important;
  box-shadow: none;
  border-radius: 0;
  margin: 0;
  padding: 0;
}

.code-block[data-fullscreen="true"] .hljs {
  height: calc(100vh - 45px);
  padding: 1rem;
  box-sizing: border-box;
}

.code-block[data-fullscreen="true"] .code-block-header {
  padding: 8px 15px;
  background-color: rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(127, 127, 127, 0.3);
}

.code-block[data-fullscreen="true"] .code-block-header {
  border-left: 4px solid #ff0080;
  transition: border-color 0.5s ease;
}

.code-block[data-fullscreen="true"] .code-block-header:hover {
  border-left-color: #00ffff;
}

.code-fullscreen-button {
  opacity: 0.6;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.code-fullscreen-button:hover {
  opacity: 1;
  transform: rotate(90deg);
}


.code-block.animate .hljs {
  transition: max-height 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.code-arrow {
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}


@media (max-width: 768px) {
  .code-block:hover:not([data-fullscreen="true"]) {
    transform: translateY(-2px) scale(1.01);
  }
  
  .code-fullscreen-button {
    right: 20px;
  }
}
​

(() => {
    const config = {
        defaultTitle: "Code",
        arrowExpandedHTML: '<svg class="code-arrow" width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M8.59 16.59L13.17 12L8.59 7.41L10 6L16 12L10 18L8.59 16.59Z"></path></svg>',
        arrowCollapsedHTML: '<svg class="code-arrow" width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M8.59 16.59L13.17 12L8.59 7.41L10 6L16 12L10 18L8.59 16.59Z"></path></svg>',
        fullscreenHTML: '<svg class="code-fullscreen" width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M7 14H5v5h5v-2H7v-3zm-2-4h2V7h3V5H5v5zm12 7h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z"></path></svg>',
        exitFullscreenHTML: '<svg class="code-fullscreen" width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M5 16h3v3h2v-5H5v2zm3-8H5v2h5V5H8v3zm6 11h2v-3h3v-2h-5v5zm2-11V5h-2v5h5V8h-3z"></path></svg>',
        headerMinWidth: 100,
        collapseAnimation: true,
        animationDuration: 300,
    };
    function addStyles() {
        const styles = `
            .code-block-header {
                display: flex;
                align-items: center;
                padding: 4px 8px;
                cursor: pointer;
                background-color: var(--b3-code-block-bg);
                color: var(--b3-protyle-inline-code-color);
                border-bottom: 1px solid rgba(127, 127, 127, 0.2);
                font-size: 13px;
                font-family: var(--b3-font-family-code);
                position: relative;
            }
  
            .code-block-title {
                margin-left: 8px;
                flex-grow: 1;
                line-height: 1.5;
                overflow: hidden;
                white-space: nowrap;
                text-overflow: ellipsis;
            }
  
            .code-arrow {
                width: 35px;
                height: 35px;
                margin-left: 20px;
                transition: transform 0.2s ease;
            }
  
            .code-fullscreen-button {
                position: absolute;
                right: 50px;
                width: 35px;
                height: 35px;
                display: flex;
                align-items: center;
                justify-content: center;
                cursor: pointer;
                opacity: 0.7;
                transition: all 0.3s ease;
            }
  
            .code-fullscreen-button:hover {
                opacity: 1;
                transform: scale(1.1);
            }
  
            .code-fullscreen {
                width: 24px;
                height: 24px;
            }
  
            .code-block-title:empty:before {
                content: "${config.defaultTitle}";
                opacity: 0.6;
            }
  
            .code-block[data-collapsed="true"] .code-block-header .code-arrow {
                transform: rotate(0deg);
            }
  
            .code-block[data-collapsed="false"] .code-block-header .code-arrow {
                transform: rotate(90deg);
            }
  
            .code-block[data-collapsed="true"] .code-block-header {
                border-bottom: none;
                opacity: 0.8;
            }
  
            .code-block-title:focus {
                outline: none;
                border-bottom: 1px dotted var(--b3-protyle-inline-code-color);
            }
  
            .code-block[data-collapsed="true"] .hljs {
                display: none;
            }
  
            .code-block[data-fullscreen="true"] {
                position: fixed;
                top: 0;
                left: 0;
                width: 100vw;
                height: 100vh;
                z-index: 9999;
                background-color: var(--b3-code-block-bg);
                display: flex;
                flex-direction: column;
                overflow: hidden;
            }
  
            .code-block[data-fullscreen="true"] .hljs {
                flex-grow: 1;
                overflow: auto;
                max-height: none !important;
                display: block !important;
                height: auto !important;
                opacity: 1 !important;
            }
  
            .code-block[data-fullscreen="true"] .code-block-header {
                position: sticky;
                top: 0;
                z-index: 1;
            }
        `;
        const styleEl = document.createElement('style');
        styleEl.innerHTML = styles;
        document.head.appendChild(styleEl);
    }
    function createCodeBlockHeader(codeBlock) {
        if (codeBlock.querySelector('.code-block-header')) {
            return;
        }
        const header = document.createElement('div');
        header.className = 'code-block-header protyle-custom';
  
        header.innerHTML = config.arrowExpandedHTML;
        const title = document.createElement('div');
        title.className = 'code-block-title';
        title.contentEditable = 'true';
        title.spellcheck = false;
  
        const language = getCodeBlockLanguage(codeBlock);
        if (language) {
            title.textContent = language;
        }
  
        header.appendChild(title);
  
        const fullscreenButton = document.createElement('div');
        fullscreenButton.className = 'code-fullscreen-button';
        fullscreenButton.innerHTML = config.fullscreenHTML;
        fullscreenButton.title = "全屏显示代码";
  
        header.appendChild(fullscreenButton);
  
        header.addEventListener('click', (e) => {
            if ((e.target === title && document.activeElement === title) || 
                fullscreenButton.contains(e.target)) {
                return;
            }
            toggleCodeBlock(codeBlock);
        });
  
        title.addEventListener('click', (e) => {
            e.stopPropagation();
        });
  
        title.addEventListener('keydown', (e) => {
            if (e.key === 'Enter') {
                e.preventDefault();
                title.blur();
            }
        });
  
        fullscreenButton.addEventListener('click', (e) => {
            e.stopPropagation();
            toggleFullscreen(codeBlock, fullscreenButton);
        });
  
        codeBlock.insertBefore(header, codeBlock.firstChild);
  
        codeBlock.setAttribute('data-collapsed', 'false');
        codeBlock.setAttribute('data-fullscreen', 'false');
    }
  
    function toggleFullscreen(codeBlock, button) {
        const isFullscreen = codeBlock.getAttribute('data-fullscreen') === 'true';
        const hljs = codeBlock.querySelector('.hljs');
  
        if (isFullscreen) {
            codeBlock.setAttribute('data-fullscreen', 'false');
            button.innerHTML = config.fullscreenHTML;
            button.title = "全屏显示代码";
  
      
            if (codeBlock._wasCollapsedBeforeFullscreen) {
           
                if (hljs) {
                    hljs.style.display = '';
                    hljs.style.maxHeight = '';
                    hljs.style.height = '';
                    hljs.style.opacity = '';
                    hljs.style.overflow = '';
    
             
                    delete hljs.dataset.animating;
                }
  
        
                setTimeout(() => {
                    codeBlock.setAttribute('data-collapsed', 'true');
                    if (hljs) {
                        hljs.style.display = 'none';
                    }
                    delete codeBlock._wasCollapsedBeforeFullscreen;
                }, 50);
            }
  
            if (window._scrollPositionBeforeFullscreen !== undefined) {
                window.scrollTo(0, window._scrollPositionBeforeFullscreen);
                delete window._scrollPositionBeforeFullscreen;
            }
        } else {
            window._scrollPositionBeforeFullscreen = window.scrollY;
  
            if (codeBlock.getAttribute('data-collapsed') === 'true') {
                codeBlock._wasCollapsedBeforeFullscreen = true;
                codeBlock.setAttribute('data-collapsed', 'false');
  
                if (hljs) {
         
                    hljs.style.display = 'block';
                    hljs.style.maxHeight = 'none';
                    hljs.style.height = 'auto';
                    hljs.style.opacity = '1';
                    hljs.style.overflow = 'auto';
    
        
                    if (hljs.dataset.animating === 'true') {
                        delete hljs.dataset.animating;
                    }
                }
            }
  
            codeBlock.setAttribute('data-fullscreen', 'true');
            button.innerHTML = config.exitFullscreenHTML;
            button.title = "退出全屏";
  
            setTimeout(() => {
                if (hljs) {
                    hljs.scrollTop = 0;
                }
            }, 0);
        }
    }
  
    function getCodeBlockLanguage(codeBlock) {
        const hljsElement = codeBlock.querySelector('.hljs');
        if (!hljsElement) return null;
  
        const classes = hljsElement.className.split(' ');
        for (const cls of classes) {
            if (cls !== 'hljs' && cls.length > 0) {
                return cls;
            }
        }
  
        return null;
    }
    function toggleCodeBlock(codeBlock) {
        if (codeBlock.getAttribute('data-fullscreen') === 'true') {
            return;
        }
  
        const isCollapsed = codeBlock.getAttribute('data-collapsed') === 'true';
        const hljs = codeBlock.querySelector('.hljs');
  
        if (!hljs) return;
  
        if (hljs.dataset.animating === 'true') {
            return;
        }
  
        hljs.dataset.animating = 'true';
  
        hljs.style.transition = 'none';
        codeBlock.classList.remove('animate');
  
        if (isCollapsed) {
            hljs.style.display = 'block';
            hljs.style.height = '0px';
            hljs.style.overflow = 'hidden';
            hljs.style.opacity = '0';
  
            const targetHeight = hljs.scrollHeight;
  
            const heightAnimation = hljs.animate([
                { height: '0px', opacity: 0 },
                { height: targetHeight + 'px', opacity: 1 }
            ], {
                duration: 250,
                easing: 'cubic-bezier(0.4, 0.0, 0.2, 1)',
                fill: 'forwards'
            });
  
            heightAnimation.onfinish = () => {
                hljs.style.height = '';
                hljs.style.overflow = '';
                hljs.style.opacity = '';
                hljs.style.transition = '';
  
                delete hljs.dataset.animating;
            };
        } else {
            const startHeight = hljs.offsetHeight;
            hljs.style.height = startHeight + 'px';
            hljs.style.overflow = 'hidden';
  
            const opacityAnimation = hljs.animate([
                { opacity: 1 },
                { opacity: 0 }
            ], {
                duration: 120,
                easing: 'ease-out',
                fill: 'forwards'
            });
  
            setTimeout(() => {
                const heightAnimation = hljs.animate([
                    { height: startHeight + 'px' },
                    { height: '0px' }
                ], {
                    duration: 180, 
                    easing: 'cubic-bezier(0.4, 0.0, 0.2, 1)',
                    fill: 'forwards'
                });
  
                heightAnimation.onfinish = () => {
                    hljs.style.display = 'none';
    
                    hljs.style.height = '';
                    hljs.style.opacity = '';
                    hljs.style.overflow = '';
                    hljs.style.transition = '';
    
                    delete hljs.dataset.animating;
                };
            }, 70);
        }
  
        codeBlock.setAttribute('data-collapsed', !isCollapsed);
    }
    function processCodeBlocks(element) {
        const codeBlocks = element.querySelectorAll('.code-block:not([data-processed="true"])');
        codeBlocks.forEach(codeBlock => {
            createCodeBlockHeader(codeBlock);
            codeBlock.setAttribute('data-processed', 'true');
        });
    }
    function observeCodeBlockAddition(container) {
        const observer = new MutationObserver(mutations => {
            mutations.forEach(mutation => {
                if (mutation.type === 'childList') {
                    mutation.addedNodes.forEach(node => {
                        if (node.nodeType === Node.ELEMENT_NODE) {
                            if (node.classList && node.classList.contains('code-block')) {
                                createCodeBlockHeader(node);
                                node.setAttribute('data-processed', 'true');
                            }
      
                            if (node.querySelectorAll) {
                                processCodeBlocks(node);
                            }
                        }
                    });
                }
            });
        });
  
        observer.observe(container, { 
            childList: true, 
            subtree: true 
        });
  
        return observer;
    }
    function setupKeyboardHandlers() {
        document.addEventListener('keydown', (e) => {
            if (e.key === 'Escape') {
                const fullscreenCodeBlock = document.querySelector('.code-block[data-fullscreen="true"]');
                if (fullscreenCodeBlock) {
                    const fullscreenButton = fullscreenCodeBlock.querySelector('.code-fullscreen-button');
                    if (fullscreenButton) {
                        toggleFullscreen(fullscreenCodeBlock, fullscreenButton);
                        e.preventDefault();
                    }
                }
            }
        });
    }
    function waitForElement(selector) {
        return new Promise(resolve => {
            if (document.querySelector(selector)) {
                return resolve(document.querySelector(selector));
            }
  
            const observer = new MutationObserver(() => {
                if (document.querySelector(selector)) {
                    observer.disconnect();
                    resolve(document.querySelector(selector));
                }
            });
  
            observer.observe(document.body, {
                childList: true,
                subtree: true
            });
        });
    }
    function isMobile() {
        return !!document.getElementById("sidebar");
    }
    async function init() {
        addStyles();
  
        setupKeyboardHandlers();
  
        const container = await waitForElement(isMobile() ? '.protyle-content' : '.layout__center');
  
        processCodeBlocks(container);
  
        observeProtyleAddition(container, protyles => {
            protyles.forEach(protyle => {
                if (!protyle.classList.contains('protyle')) {
                    protyle = protyle.closest('.protyle');
                }
  
                if (protyle) {
                    processCodeBlocks(protyle);
                    observeCodeBlockAddition(protyle);
                }
            });
        });
    }
    function observeProtyleAddition(container, callback) {
        const observer = new MutationObserver(mutations => {
            const protyles = [];
  
            mutations.forEach(mutation => {
                if (mutation.type === 'childList') {
                    mutation.addedNodes.forEach(node => {
                        if (node.nodeType === Node.ELEMENT_NODE) {
                            if (node.classList && 
                                (node.classList.contains('protyle') || 
                                 node.classList.contains('protyle-content'))) {
                                protyles.push(node);
                            }
                        }
                    });
                }
            });
  
            if (protyles.length > 0) {
                callback(protyles);
            }
        });
  
        observer.observe(container, { 
            childList: true, 
            subtree: true 
        });
  
        return observer;
    }
    init();
})();
​