Render raw .md pages with a pleasant, GitHub-like preview
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// ==UserScript== // @name Markdown Viewer // @namespace https://docs.scriptcat.org/ // @version 0.2.2 // @description Render raw .md pages with a pleasant, GitHub-like preview // @author You // @match *://*/*/*.md // @match *://*/*/*.mkd // @match *://*/*/*.mdwn // @match *://*/*/*.mdown // @match *://*/*/*.mdtxt // @match *://*/*/*.mdtext // @match *://*/*/*.markdown // @match *://*/*/*.text // @inject-into content // @require https://cdn.jsdelivr.net/npm/[email protected]/lib/marked.umd.min.js // @grant GM_addStyle // @license MIT // ==/UserScript== (function () { 'use strict'; // 僅在頁面內容是單一 <pre>（常見的純文字 .md 顯示）時啟動 const pre = document.querySelector('body>pre:only-child'); if (!pre) return; const text = pre.textContent || ''; if (!text.trim()) return; // 產出容器 const wrapper = document.createElement('main'); wrapper.id = 'mdv-wrapper'; const body = document.body; // 產出渲染區 const render = document.createElement('article'); render.id = 'markdown-render'; render.className = 'markdown-body'; render.innerHTML = marked.parse(text); wrapper.appendChild(render); pre.replaceWith(wrapper); // ===== 風格樣式：接近 GitHub，含淺/深色 ===== // 色票（同時支援 prefers-color-scheme） GM_addStyle(` :root { color-scheme: light dark; --mdv-bg: #ffffff; --mdv-fg: #24292f; --mdv-muted: #57606a; --mdv-border: #d0d7de; --mdv-link: #0969da; --mdv-code-bg: #f6f8fa; --mdv-kbd-bg: #f6f8fa; --mdv-kbd-border: #d0d7de; --mdv-quote: #d0d7de; --mdv-table-stripe: #f6f8fa; } @media (prefers-color-scheme: dark) { :root { --mdv-bg: #0d1117; --mdv-fg: #c9d1d9; --mdv-muted: #8b949e; --mdv-border: #30363d; --mdv-link: #58a6ff; --mdv-code-bg: #161b22; --mdv-kbd-bg: #161b22; --mdv-kbd-border: #30363d; --mdv-quote: #30363d; --mdv-table-stripe: #161b22; } } /* 基礎排版（避免 all: unset 破壞 UA 樣式與可用性） */ html, body { margin: 0; padding: 0; background: var(--mdv-bg); color: var(--mdv-fg); font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji"; line-height: 1.6; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; } /* 置中內容區；窄邊欄視窗也好讀 */ #mdv-wrapper { display: block; box-sizing: border-box; padding: 24px 16px; } .markdown-body { box-sizing: border-box; max-width: 860px; margin: 0 auto; background: transparent; padding: 32px 24px; } /* 標題階層與間距（接近 GitHub） */ .markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 { font-weight: 600; line-height: 1.25; margin-top: 1.6em; margin-bottom: .8em; } .markdown-body h1 { font-size: 2em; border-bottom: 1px solid var(--mdv-border); padding-bottom: .3em; } .markdown-body h2 { font-size: 1.5em; border-bottom: 1px solid var(--mdv-border); padding-bottom: .3em; } .markdown-body h3 { font-size: 1.25em; } .markdown-body h4 { font-size: 1em; } .markdown-body h5 { font-size: .875em; } .markdown-body h6 { font-size: .85em; color: var(--mdv-muted); } /* 文字與段落 */ .markdown-body p { margin: 0 0 1em 0; } .markdown-body strong { font-weight: 600; } .markdown-body em { font-style: italic; } .markdown-body small { font-size: 0.875em; color: var(--mdv-muted); } /* 連結 */ .markdown-body a { color: var(--mdv-link); text-decoration: underline; text-underline-offset: 2px; } .markdown-body a:hover { text-decoration-thickness: 2px; } /* 圖片與影片 */ .markdown-body img, .markdown-body video, .markdown-body canvas, .markdown-body svg { max-width: 100%; height: auto; } /* 清單 */ .markdown-body ul, .markdown-body ol { padding-left: 2em; margin: 0 0 1em 0; } .markdown-body li + li { margin-top: .25em; } .markdown-body li > p { margin-top: .25em; margin-bottom: .25em; } /* 代辦清單 (task list) */ .markdown-body input[type="checkbox"] { margin: 0 .4em 0 -1.3em; vertical-align: middle; } /* 引言 */ .markdown-body blockquote { margin: 0 0 1em 0; padding: .5em 1em; color: var(--mdv-muted); border-left: .25em solid var(--mdv-quote); background: transparent; } /* 分隔線 */ .markdown-body hr { height: 1px; border: 0; background: var(--mdv-border); margin: 1.5em 0; } /* 程式碼（inline / block） */ .markdown-body code, .markdown-body tt { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: .95em; background: var(--mdv-code-bg); padding: .2em .4em; border-radius: 6px; } .markdown-body pre { background: var(--mdv-code-bg); padding: 1em; border: 1px solid var(--mdv-border); border-radius: 8px; overflow: auto; line-height: 1.45; margin: 0 0 1em 0; } .markdown-body pre code { background: transparent; padding: 0; font-size: .95em; } /* 表格 */ .markdown-body table { border-collapse: collapse; width: 100%; margin: 0 0 1em 0; display: block; overflow: auto; border: 1px solid var(--mdv-border); border-radius: 8px; } .markdown-body th, .markdown-body td { border: 1px solid var(--mdv-border); padding: .6em .8em; } .markdown-body thead th { background: var(--mdv-code-bg); text-align: left; } .markdown-body tbody tr:nth-child(2n) { background: var(--mdv-table-stripe); } /* 行內鍵位標記 */ .markdown-body kbd { background: var(--mdv-kbd-bg); border: 1px solid var(--mdv-kbd-border); border-bottom-width: 2px; border-radius: 6px; padding: .15em .35em; font-size: .85em; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; } /* 摺疊區/詳情 */ .markdown-body details { margin-bottom: 1em; } .markdown-body summary { cursor: pointer; font-weight: 600; } /* 讓超長單字換行避免溢出 */ .markdown-body { overflow-wrap: anywhere; } /* 讓最外層也能捲動（圖片很多時） */ html, body { height: 100%; } `); // 可選：若你之後想用 highlight.js，自行加上 @require 與主題 CSS，再在這裡呼叫 hljs.highlightAll(); })();
