dependabot/npm_and_yarn/eslint-9.39.1
dependabot/npm_and_yarn/eslint-9.39.1
dependabot/npm_and_yarn/eslint-plugin-astro-1.5.0
dependabot/npm_and_yarn/eslint/js-9.39.1
dependabot/npm_and_yarn/katex-0.16.25
dependabot/npm_and_yarn/sharp-0.34.5
dependabot/npm_and_yarn/tailwindcss/vite-4.1.17
dependabot/npm_and_yarn/tsx-4.20.6
dependabot/npm_and_yarn/typescript-eslint-8.46.4
dependabot/npm_and_yarn/typescript-eslint/eslint-plugin-8.36.0
dependabot/npm_and_yarn/typescript-eslint/parser-8.46.4
main
| 1 | --- |
| 2 | import { SITE } from '@/config' |
| 3 | import type { TOCProps } from '@/types' |
| 4 | |
| 5 | const { toc = [] }: TOCProps = Astro.props |
| 6 | --- |
| 7 | |
| 8 | <div class="toc-container" id="toc"> |
| 9 | <nav class="toc-nav"> |
| 10 | <ul class="toc-list" id="toc-list"> |
| 11 | <!-- Back to top link --> |
| 12 | <li class="toc-item toc-level-0"> |
| 13 | <a href="#" class="toc-link toc-title" title="Back to top" data-text="Back to top"> |
| 14 | Back to top |
| 15 | </a> |
| 16 | </li> |
| 17 | |
| 18 | <!-- TOC items --> |
| 19 | { |
| 20 | toc.map((item) => ( |
| 21 | <li class={`toc-item toc-level-${item.level}`}> |
| 22 | <a |
| 23 | href={`#${item.id}`} |
| 24 | class="toc-link" |
| 25 | title={item.text} |
| 26 | data-text={item.text} |
| 27 | data-heading-id={item.id} |
| 28 | > |
| 29 | {item.text} |
| 30 | </a> |
| 31 | </li> |
| 32 | )) |
| 33 | } |
| 34 | </ul> |
| 35 | </nav> |
| 36 | </div> |
| 37 | |
| 38 | <script |
| 39 | is:inline |
| 40 | define:vars={{ |
| 41 | contentWidth: SITE.contentWidth, |
| 42 | centeredLayout: SITE.centeredLayout, |
| 43 | toc: SITE.toc |
| 44 | }} |
| 45 | > |
| 46 | ;(function () { |
| 47 | let isInitialized = false |
| 48 | |
| 49 | // TOC positioning logic (similar to BackButton) |
| 50 | function adjustTOCPosition() { |
| 51 | const tocContainer = document.querySelector('.toc-container') |
| 52 | if (!tocContainer) return |
| 53 | |
| 54 | // If not using centered layout, hide TOC |
| 55 | if (!centeredLayout) { |
| 56 | tocContainer.style.display = 'none' |
| 57 | return |
| 58 | } |
| 59 | |
| 60 | // Calculate available margin space for positioning |
| 61 | const pageWidth = window.innerWidth |
| 62 | const contentWidthValue = parseFloat(contentWidth) |
| 63 | const margin = (pageWidth - contentWidthValue * 16) / 2 |
| 64 | const baseMinSpace = 11 * 16 // Base minimum space needed |
| 65 | // If toc is enabled, need additional 2.5rem (40px) space |
| 66 | const minSpace = toc ? baseMinSpace + 40 : baseMinSpace |
| 67 | |
| 68 | // Show and position TOC fixed on the left if there's enough space |
| 69 | if (margin >= minSpace) { |
| 70 | tocContainer.style.display = 'block' |
| 71 | tocContainer.classList.add('fixed-position') |
| 72 | const basePosition = margin - baseMinSpace |
| 73 | // If toc is enabled, move 2.5rem (40px) further left |
| 74 | const leftPosition = toc ? basePosition - 40 : basePosition |
| 75 | tocContainer.style.left = `${leftPosition}px` |
| 76 | } else { |
| 77 | tocContainer.style.display = 'none' |
| 78 | tocContainer.classList.remove('fixed-position') |
| 79 | tocContainer.style.left = '' |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | // Hide TOC if there are no headings (only title) |
| 84 | function checkTOCVisibility() { |
| 85 | const tocContainer = document.querySelector('.toc-container') |
| 86 | const tocItems = document.querySelectorAll('.toc-item:not(.toc-level-0)') |
| 87 | |
| 88 | if (tocContainer && tocItems.length === 0) { |
| 89 | tocContainer.style.display = 'none' |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | // Add click handlers to TOC links using event delegation |
| 94 | function addTOCEventListeners() { |
| 95 | const tocContainer = document.querySelector('.toc-container') |
| 96 | if (!tocContainer) return |
| 97 | |
| 98 | // Use event delegation for better performance and reliability |
| 99 | tocContainer.addEventListener('click', function (e) { |
| 100 | const link = e.target.closest('.toc-link') |
| 101 | if (!link) return |
| 102 | |
| 103 | e.preventDefault() |
| 104 | |
| 105 | if (link.classList.contains('toc-title')) { |
| 106 | // Back to top |
| 107 | window.scrollTo({ top: 0, behavior: 'smooth' }) |
| 108 | history.pushState(null, null, '#') |
| 109 | } else { |
| 110 | // TOC item |
| 111 | const href = link.getAttribute('href') |
| 112 | if (href && href.startsWith('#')) { |
| 113 | const targetId = href.substring(1) |
| 114 | const target = document.getElementById(targetId) |
| 115 | if (target) { |
| 116 | const rect = target.getBoundingClientRect() |
| 117 | const scrollTop = window.pageYOffset || document.documentElement.scrollTop |
| 118 | const offset = rect.top + scrollTop - 96 // 6rem = 96px |
| 119 | window.scrollTo({ top: offset, behavior: 'smooth' }) |
| 120 | history.pushState(null, null, href) |
| 121 | } |
| 122 | } |
| 123 | } |
| 124 | }) |
| 125 | } |
| 126 | |
| 127 | // Update active TOC item based on scroll position |
| 128 | function updateActiveTOCItem() { |
| 129 | const tocLinks = document.querySelectorAll('.toc-link') |
| 130 | const headings = document.querySelectorAll('h1, h2, h3') |
| 131 | |
| 132 | let currentActive = null |
| 133 | const scrollTop = window.pageYOffset + 100 // Offset for better detection |
| 134 | |
| 135 | // Check headings |
| 136 | headings.forEach((heading, index) => { |
| 137 | if (index === 0 && heading.tagName === 'H1') return |
| 138 | |
| 139 | const rect = heading.getBoundingClientRect() |
| 140 | const offsetTop = rect.top + window.pageYOffset |
| 141 | |
| 142 | if (scrollTop >= offsetTop) { |
| 143 | currentActive = heading.id |
| 144 | } |
| 145 | }) |
| 146 | |
| 147 | tocLinks.forEach((link) => { |
| 148 | link.classList.remove('active') |
| 149 | if (link.getAttribute('href') === `#${currentActive}`) { |
| 150 | link.classList.add('active') |
| 151 | } |
| 152 | }) |
| 153 | |
| 154 | // Always highlight the first item ("Back to top") unless another TOC item is active |
| 155 | if (!currentActive) { |
| 156 | const titleLink = document.querySelector('.toc-link.toc-title') |
| 157 | if (titleLink) { |
| 158 | titleLink.classList.add('active') |
| 159 | } |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | function initTOC() { |
| 164 | if (isInitialized) return |
| 165 | |
| 166 | adjustTOCPosition() |
| 167 | checkTOCVisibility() |
| 168 | addTOCEventListeners() |
| 169 | updateActiveTOCItem() // Initial active state |
| 170 | |
| 171 | isInitialized = true |
| 172 | } |
| 173 | |
| 174 | // Initialize on page load |
| 175 | function handlePageLoad() { |
| 176 | initTOC() |
| 177 | } |
| 178 | |
| 179 | // Listen for various page load events |
| 180 | document.addEventListener('astro:page-load', handlePageLoad) |
| 181 | document.addEventListener('DOMContentLoaded', handlePageLoad) |
| 182 | |
| 183 | // Also initialize immediately if DOM is already loaded |
| 184 | if (document.readyState === 'loading') { |
| 185 | document.addEventListener('DOMContentLoaded', handlePageLoad) |
| 186 | } else { |
| 187 | handlePageLoad() |
| 188 | } |
| 189 | |
| 190 | // Re-initialize on resize and scroll |
| 191 | window.addEventListener('resize', adjustTOCPosition) |
| 192 | window.addEventListener('scroll', updateActiveTOCItem) |
| 193 | })() |
| 194 | </script> |
| 195 | |
| 196 | <style is:global> |
| 197 | .toc-container { |
| 198 | width: 12rem; |
| 199 | position: relative; |
| 200 | left: -0.175em; |
| 201 | } |
| 202 | |
| 203 | .toc-nav { |
| 204 | font-family: var(--font-serif); |
| 205 | font-size: var(--font-size-s); |
| 206 | line-height: 1.5; |
| 207 | } |
| 208 | |
| 209 | .toc-list { |
| 210 | list-style: none; |
| 211 | list-style-type: none; |
| 212 | margin: 0 !important; |
| 213 | padding: 0 !important; |
| 214 | } |
| 215 | |
| 216 | .toc-list li { |
| 217 | margin: 0 !important; |
| 218 | padding: 0 !important; |
| 219 | } |
| 220 | |
| 221 | .toc-item { |
| 222 | list-style: none; |
| 223 | list-style-type: none; |
| 224 | } |
| 225 | |
| 226 | .toc-item::before { |
| 227 | display: none; |
| 228 | } |
| 229 | |
| 230 | .toc-item::marker { |
| 231 | display: none; |
| 232 | } |
| 233 | |
| 234 | .toc-link { |
| 235 | display: block; |
| 236 | color: transparent; |
| 237 | text-decoration: none; |
| 238 | position: relative; |
| 239 | padding-left: 0; |
| 240 | height: 1.125rem; |
| 241 | width: 100%; |
| 242 | min-height: 1rem; |
| 243 | font-size: 0; |
| 244 | line-height: 1.125rem; |
| 245 | text-indent: 2rem; |
| 246 | overflow: hidden; |
| 247 | white-space: nowrap; |
| 248 | text-overflow: ellipsis; |
| 249 | transition: |
| 250 | color 0.2s ease-out, |
| 251 | font-size 0.2s ease-out, |
| 252 | text-indent 0.2s ease-out; |
| 253 | cursor: pointer; |
| 254 | } |
| 255 | |
| 256 | .toc-link::after { |
| 257 | content: attr(data-text); |
| 258 | position: absolute; |
| 259 | left: -0.5rem; |
| 260 | top: 0; |
| 261 | font-family: var(--font-sans); |
| 262 | font-size: var(--font-size-s); |
| 263 | letter-spacing: var(--spacing-m); |
| 264 | line-height: 1.125rem; |
| 265 | color: var(--text-primary); |
| 266 | opacity: 0; |
| 267 | transition: |
| 268 | opacity 0.2s ease-out, |
| 269 | left 0.2s ease-out; |
| 270 | pointer-events: none; |
| 271 | overflow: hidden; |
| 272 | white-space: nowrap; |
| 273 | text-overflow: ellipsis; |
| 274 | max-width: 100%; |
| 275 | } |
| 276 | |
| 277 | .toc-link:hover::after { |
| 278 | opacity: 1; |
| 279 | left: -0.75rem; |
| 280 | } |
| 281 | |
| 282 | .toc-level-0 .toc-link:hover::after { |
| 283 | opacity: 0; |
| 284 | } |
| 285 | |
| 286 | .toc-level-1 .toc-link:hover::before, |
| 287 | .toc-level-2 .toc-link:hover::before, |
| 288 | .toc-level-3 .toc-link:hover::before { |
| 289 | width: 0.75rem; |
| 290 | transition: width 0.1s ease-out; |
| 291 | } |
| 292 | |
| 293 | .toc-link.active { |
| 294 | color: var(--text-primary); |
| 295 | } |
| 296 | |
| 297 | /* Horizontal line indicators */ |
| 298 | .toc-level-0 .toc-link::before, |
| 299 | .toc-level-1 .toc-link::before, |
| 300 | .toc-level-2 .toc-link::before, |
| 301 | .toc-level-3 .toc-link::before { |
| 302 | content: ''; |
| 303 | position: absolute; |
| 304 | left: 0; |
| 305 | top: 50%; |
| 306 | width: 2.5rem; |
| 307 | height: 1px; |
| 308 | background-color: var(--text-tertiary); |
| 309 | transform: translateY(-50%); |
| 310 | opacity: 0.4; |
| 311 | transition: all 0.1s ease-out; |
| 312 | } |
| 313 | |
| 314 | .toc-link:hover::before, |
| 315 | .toc-link.active::before { |
| 316 | opacity: 0.8; |
| 317 | background-color: var(--text-primary); |
| 318 | } |
| 319 | |
| 320 | .toc-container.fixed-position { |
| 321 | position: fixed; |
| 322 | top: 12rem; /* Position below BackButton */ |
| 323 | margin-top: 0; |
| 324 | padding-left: 1rem; |
| 325 | z-index: 10; |
| 326 | } |
| 327 | |
| 328 | /* Hide on mobile and when space is limited */ |
| 329 | @media (max-width: 768px) { |
| 330 | .toc-container { |
| 331 | display: none !important; |
| 332 | } |
| 333 | } |
| 334 | </style> |