feat(markdown)!: group code copy button strings into one option

`markdown.codeCopyButton` now holds both the button tooltip
(`tooltipText`) and the text shown after copying (`copiedText`),
per-locale overridable via `locales.<index>.markdown.codeCopyButton`.
The copied text is emitted as a `data-copied` attribute on the button
and rendered by the theme with `content: attr(data-copied)`.

BREAKING CHANGE: `markdown.codeCopyButtonTitle` is now
`markdown.codeCopyButton.tooltipText`, and its default changed from
"Copy Code" to "Copy code". The `--vp-code-copy-copied-text-content`
CSS variable and its built-in per-language `:lang()` defaults are
removed - set `codeCopyButton.copiedText` (per locale) instead.

close #4431

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

__tests__/unit/node/markdown/plugins/containers.test.ts

@@ -91,7 +91,7 @@ describe('node/markdown/plugins/containers', () => {
       <p>content</p>
       </div>
       <details  class="details custom-block"><summary>Click me to toggle the code</summary>
-      <div class="language-js"><button title="Copy Code" class="copy"></button><span class="lang">js</span><pre><code class="language-js">console.log('hi')
+      <div class="language-js"><button title="Copy code" data-copied="Copied" class="copy"></button><span class="lang">js</span><pre><code class="language-js">console.log('hi')
       </code></pre>
       </div></details>
       "
@@ -273,9 +273,9 @@ describe('node/markdown/plugins/containers', () => {
     ].join('\n')
     expect(await render(src)).toMatchInlineSnapshot(`
       "<div class="vp-code-group"><div class="tabs"><input type="radio" name="group-0" id="tab-1" checked><label data-title="config.js" for="tab-1">config.js</label><input type="radio" name="group-0" id="tab-2" ><label data-title="config.ts" for="tab-2">config.ts</label></div><div class="blocks">
-      <div class="language-js active"><button title="Copy Code" class="copy"></button><span class="lang">js</span><pre><code class="language-js">const a = 1
+      <div class="language-js active"><button title="Copy code" data-copied="Copied" class="copy"></button><span class="lang">js</span><pre><code class="language-js">const a = 1
       </code></pre>
-      </div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre><code class="language-ts">const a: number = 1
+      </div><div class="language-ts"><button title="Copy code" data-copied="Copied" class="copy"></button><span class="lang">ts</span><pre><code class="language-ts">const a: number = 1
       </code></pre>
       </div></div></div>
       "
@@ -435,7 +435,7 @@ describe('node/markdown/plugins/containers (github alerts)', () => {
       <ul>
       <li>list item</li>
       </ul>
-      <div class="language-js"><button title="Copy Code" class="copy"></button><span class="lang">js</span><pre><code class="language-js">const a = 1
+      <div class="language-js"><button title="Copy code" data-copied="Copied" class="copy"></button><span class="lang">js</span><pre><code class="language-js">const a = 1
       </code></pre>
       </div></div>
       "
@@ -569,18 +569,24 @@ describe('node/markdown/plugins/containers (locales)', () => {
     ).rejects.toThrow('is not registered in the root markdown config')
   })
 
-  test('resolves the code copy button title for the active locale', async () => {
+  test('resolves the code copy button strings for the active locale', async () => {
     const src = '```js\nconst a = 1\n```'
     const opts: MarkdownOptions = {
-      codeCopyButtonTitle: 'Copy Code',
-      locales: { zh: { codeCopyButtonTitle: '复制代码' } }
+      codeCopyButton: { copiedText: 'Copied!' },
+      locales: {
+        zh: {
+          codeCopyButton: { tooltipText: '复制代码', copiedText: '已复制' }
+        }
+      }
     }
-    expect(await render(src, opts, { localeIndex: 'zh' })).toContain(
-      'title="复制代码"'
-    )
-    expect(await render(src, opts, { localeIndex: 'es' })).toContain(
-      'title="Copy Code"'
-    )
-    expect(await render(src, opts)).toContain('title="Copy Code"')
+    const zh = await render(src, opts, { localeIndex: 'zh' })
+    expect(zh).toContain('title="复制代码"')
+    expect(zh).toContain('data-copied="已复制"')
+    const es = await render(src, opts, { localeIndex: 'es' })
+    expect(es).toContain('title="Copy code"')
+    expect(es).toContain('data-copied="Copied!"')
+    const root = await render(src, opts)
+    expect(root).toContain('title="Copy code"')
+    expect(root).toContain('data-copied="Copied!"')
   })
 })

docs/.vitepress/config.ts

@@ -45,7 +45,6 @@ export default defineConfig({
 
   markdown: {
     math: true,
-    codeCopyButtonTitle: 'Copy code',
     codeTransformers: [
       // We use `[!!code` and `@@include` in demo to prevent transformation,
       // here we revert it back.

docs/en/guide/i18n.md

@@ -59,7 +59,7 @@ Refer [`DefaultTheme.Config`](https://github.com/vuejs/vitepress/blob/main/types
 
 ## Per-locale Markdown Strings
 
-Strings baked into pages by the markdown renderer - the default titles of [custom containers](./markdown#custom-containers) and [GitHub-flavored alerts](./markdown#github-flavored-alerts), and the tooltip of the code copy button - can be overridden per locale with the `markdown` key of a locale entry:
+Strings baked into pages by the markdown renderer - the default titles of [custom containers](./markdown#custom-containers) and [GitHub-flavored alerts](./markdown#github-flavored-alerts), and the strings of the code copy button - can be overridden per locale with the `markdown` key of a locale entry:
 
 ```ts [docs/.vitepress/config.ts]
 import { defineConfig } from 'vitepress'
@@ -76,7 +76,7 @@ export default defineConfig({
           warningLabel: '警告'
           // ...the other labels, and titles of `customContainers`
         },
-        codeCopyButtonTitle: '复制代码'
+        codeCopyButton: { tooltipText: '复制代码', copiedText: '已复制' }
       }
     }
   }

docs/es/config.ts

@@ -19,7 +19,7 @@ export const markdown: MarkdownLocaleOptions = {
     importantLabel: 'IMPORTANTE',
     cautionLabel: 'PRECAUCIÓN'
   },
-  codeCopyButtonTitle: 'Copiar código'
+  codeCopyButton: { tooltipText: 'Copiar código', copiedText: 'Copiado' }
 }
 
 export default defineAdditionalConfig({

docs/fa/config.ts

@@ -19,7 +19,7 @@ export const markdown: MarkdownLocaleOptions = {
     importantLabel: 'مهم',
     cautionLabel: 'احتیاط'
   },
-  codeCopyButtonTitle: 'کپی کد'
+  codeCopyButton: { tooltipText: 'کپی کد', copiedText: 'کپی شد' }
 }
 
 export default defineAdditionalConfig({

docs/ja/config.ts

@@ -19,7 +19,7 @@ export const markdown: MarkdownLocaleOptions = {
     importantLabel: '重要',
     cautionLabel: '注意'
   },
-  codeCopyButtonTitle: 'コードをコピー'
+  codeCopyButton: { tooltipText: 'コードをコピー', copiedText: 'コピー完了' }
 }
 
 export default defineAdditionalConfig({

docs/ko/config.ts

@@ -19,7 +19,7 @@ export const markdown: MarkdownLocaleOptions = {
     importantLabel: '중요',
     cautionLabel: '주의'
   },
-  codeCopyButtonTitle: '코드 복사'
+  codeCopyButton: { tooltipText: '코드 복사', copiedText: '복사됨' }
 }
 
 export default defineAdditionalConfig({

docs/pt/config.ts

@@ -19,7 +19,7 @@ export const markdown: MarkdownLocaleOptions = {
     importantLabel: 'IMPORTANTE',
     cautionLabel: 'CUIDADO'
   },
-  codeCopyButtonTitle: 'Copiar código'
+  codeCopyButton: { tooltipText: 'Copiar código', copiedText: 'Copiado' }
 }
 
 export default defineAdditionalConfig({

docs/ru/config.ts

@@ -19,7 +19,7 @@ export const markdown: MarkdownLocaleOptions = {
     importantLabel: 'ВАЖНО',
     cautionLabel: 'ВНИМАНИЕ'
   },
-  codeCopyButtonTitle: 'Скопировать код'
+  codeCopyButton: { tooltipText: 'Скопировать код', copiedText: 'Скопировано' }
 }
 
 export default defineAdditionalConfig({

docs/zh/config.ts

@@ -19,7 +19,7 @@ export const markdown: MarkdownLocaleOptions = {
     importantLabel: '重要',
     cautionLabel: '小心'
   },
-  codeCopyButtonTitle: '复制代码'
+  codeCopyButton: { tooltipText: '复制代码', copiedText: '已复制' }
 }
 
 export default defineAdditionalConfig({

src/client/theme-default/styles/components/vp-doc.css

@@ -518,7 +518,7 @@
   color: var(--vp-code-copy-code-active-text);
   background-color: var(--vp-code-copy-code-hover-bg);
   white-space: nowrap;
-  content: var(--vp-code-copy-copied-text-content);
+  content: attr(data-copied);
 }
 
 .vp-doc [class*='language-'] > span.lang {

src/client/theme-default/styles/vars.css

@@ -365,7 +365,6 @@
   --vp-code-copy-code-hover-border-color: var(--vp-c-divider);
   --vp-code-copy-code-hover-bg: var(--vp-c-bg);
   --vp-code-copy-code-active-text: var(--vp-c-text-2);
-  --vp-code-copy-copied-text-content: 'Copied';
 
   --vp-code-tab-divider: var(--vp-code-block-divider-color);
   --vp-code-tab-text-color: var(--vp-c-text-2);
@@ -375,26 +374,6 @@
   --vp-code-tab-active-bar-color: var(--vp-c-brand-1);
 }
 
-:lang(es),
-:lang(pt) {
-  --vp-code-copy-copied-text-content: 'Copiado';
-}
-:lang(fa) {
-  --vp-code-copy-copied-text-content: 'کپی شد';
-}
-:lang(ja) {
-  --vp-code-copy-copied-text-content: 'コピー完了';
-}
-:lang(ko) {
-  --vp-code-copy-copied-text-content: '복사됨';
-}
-:lang(ru) {
-  --vp-code-copy-copied-text-content: 'Скопировано';
-}
-:lang(zh) {
-  --vp-code-copy-copied-text-content: '已复制';
-}
-
 /**
  * Component: Button
  * -------------------------------------------------------------------------- */

src/node/markdown/markdown.ts

@@ -35,7 +35,12 @@ import mditCjkFriendly from 'markdown-it-cjk-friendly'
 import path from 'node:path'
 import type { BuiltinLanguage, BuiltinTheme, Highlighter } from 'shiki'
 import type { Logger } from 'vite'
-import type { Awaitable, LocaleConfig, MarkdownLocaleOptions } from '../shared'
+import type {
+  Awaitable,
+  CodeCopyButtonOptions,
+  LocaleConfig,
+  MarkdownLocaleOptions
+} from '../shared'
 import {
   containerPlugin,
   gitHubAlertsPlugin,
@@ -176,10 +181,11 @@ export interface MarkdownOptions extends MarkdownItAsyncOptions {
    */
   preWrapper?: boolean
   /**
-   * The tooltip text for the copy button in code blocks.
-   * @default 'Copy Code'
+   * Strings for the copy button in code blocks: `tooltipText` is the
+   * button's tooltip and `copiedText` is shown next to it after copying.
+   * @default { tooltipText: 'Copy code', copiedText: 'Copied' }
    */
-  codeCopyButtonTitle?: string
+  codeCopyButton?: CodeCopyButtonOptions
   /**
    * Custom language labels for display.
    * Overrides the default language label shown in code blocks.
@@ -349,7 +355,10 @@ export async function createMarkdownRenderer(
   publicDir ??= path.resolve(srcDir, 'public')
 
   const theme = options.theme ?? { light: 'github-light', dark: 'github-dark' }
-  const codeCopyButtonTitle = options.codeCopyButtonTitle || 'Copy Code'
+  const codeCopyButton = {
+    tooltipText: options.codeCopyButton?.tooltipText || 'Copy code',
+    copiedText: options.codeCopyButton?.copiedText || 'Copied'
+  }
 
   const [highlight, dispose] = options.highlight
     ? [options.highlight, () => {}]
@@ -372,7 +381,7 @@ export async function createMarkdownRenderer(
   // VitePress customizations
   if (options.preWrapper !== false) {
     preWrapperPlugin(md, {
-      codeCopyButtonTitle,
+      codeCopyButton,
       languageLabel: options.languageLabel,
       locales: options.locales
     })

src/node/markdown/plugins/preWrapper.ts

@@ -2,10 +2,10 @@ import type { MarkdownItAsync } from 'markdown-it-async'
 import type { MarkdownEnv, MarkdownLocaleOptions } from '../../shared'
 
 export interface Options {
-  codeCopyButtonTitle: string
+  codeCopyButton: { tooltipText: string; copiedText: string }
   languageLabel?: Record<string, string>
   /**
-   * Per-locale overrides for the copy button title, keyed by locale index.
+   * Per-locale overrides for the copy button strings, keyed by locale index.
    */
   locales?: Record<string, MarkdownLocaleOptions | undefined>
 }
@@ -31,13 +31,18 @@ export function preWrapperPlugin(md: MarkdownItAsync, options: Options) {
     const label = langLabel[lang.toLowerCase()] || lang.replace(/_/g, ' ')
 
     const { localeIndex } = (env ?? {}) as MarkdownEnv
-    const codeCopyButtonTitle =
-      (localeIndex && options.locales?.[localeIndex]?.codeCopyButtonTitle) ||
-      options.codeCopyButtonTitle
+    const localeButton = localeIndex
+      ? options.locales?.[localeIndex]?.codeCopyButton
+      : undefined
+    const tooltipText =
+      localeButton?.tooltipText || options.codeCopyButton.tooltipText
+    // rendered by the theme via `content: attr(data-copied)`
+    const copiedText =
+      localeButton?.copiedText || options.codeCopyButton.copiedText
 
     return (
       `<div class="language-${lang}${active}">` +
-      `<button title="${codeCopyButtonTitle}" class="copy"></button>` +
+      `<button title="${tooltipText}" data-copied="${copiedText}" class="copy"></button>` +
       `<span class="lang">${label}</span>` +
       fence(...args) +
       '</div>'

src/shared/shared.ts

@@ -10,6 +10,7 @@ export type {
   AdditionalConfigDict,
   AdditionalConfigLoader,
   Awaitable,
+  CodeCopyButtonOptions,
   ContainerOptions,
   DefaultTheme,
   HeadConfig,

types/shared.d.ts

@@ -230,6 +230,19 @@ export interface ContainerOptions {
   customContainers?: Record<string, string>
 }
 
+export interface CodeCopyButtonOptions {
+  /**
+   * The tooltip (`title` attribute) of the copy button in code blocks.
+   * @default 'Copy code'
+   */
+  tooltipText?: string
+  /**
+   * The text shown next to the copy button after copying.
+   * @default 'Copied'
+   */
+  copiedText?: string
+}
+
 /**
  * Build-time markdown strings that can be overridden per locale. Set them
  * under `locales.<index>.markdown` in the site config; values fall back to
@@ -242,9 +255,9 @@ export interface MarkdownLocaleOptions {
    */
   container?: ContainerOptions
   /**
-   * Locale-specific tooltip text for the copy button in code blocks.
+   * Locale-specific strings for the copy button in code blocks.
    */
-  codeCopyButtonTitle?: string
+  codeCopyButton?: CodeCopyButtonOptions
 }
 
 export type LocaleConfig<ThemeConfig = any> = Record<