refactor(theme): dates should be formatted on the client-side instead of in nodejs code

packages/docusaurus-plugin-content-blog/src/__tests__/index.test.ts

@@ -41,6 +41,7 @@ const markdown: MarkdownConfig = {
     }
     return result;
   },
+  remarkRehypeOptions: undefined,
 };
 
 function findByTitle(
@@ -175,7 +176,6 @@ describe('blog plugin', () => {
       description: `date inside front matter`,
       authors: [],
       date: new Date('2019-01-01'),
-      formattedDate: 'January 1, 2019',
       frontMatter: {
         date: new Date('2019-01-01'),
         tags: ['date'],
@@ -210,17 +210,18 @@ describe('blog plugin', () => {
       description: `Happy birthday! (translated)`,
       authors: [
         {
+          imageURL: undefined,
           name: 'Yangshun Tay (translated)',
         },
         {
+          imageURL: undefined,
           email: 'lorber.sebastien@gmail.com',
           key: 'slorber',
           name: 'Sébastien Lorber (translated)',
           title: 'Docusaurus maintainer (translated)',
         },
       ],
       date: new Date('2018-12-14'),
-      formattedDate: 'December 14, 2018',
       frontMatter: {
         authors: [
           {
@@ -256,7 +257,6 @@ describe('blog plugin', () => {
         title: 'Simple Slug',
       },
       date: new Date('2020-08-16'),
-      formattedDate: 'August 16, 2020',
       frontMatter: {
         date: '2020/08/16',
         slug: '/hey/my super path/héllô',
@@ -302,7 +302,6 @@ describe('blog plugin', () => {
         title: 'draft',
       },
       date: new Date('2020-08-15'),
-      formattedDate: 'August 15, 2020',
       frontMatter: {
         author: 'Sébastien Lorber',
         author_title: 'Docusaurus maintainer',
@@ -328,7 +327,6 @@ describe('blog plugin', () => {
       description: '',
       authors: [],
       date: new Date('2019-01-02'),
-      formattedDate: 'January 2, 2019',
       frontMatter: {
         date: new Date('2019-01-02'),
       },
@@ -343,39 +341,6 @@ describe('blog plugin', () => {
     });
   });
 
-  it('builds simple website blog with localized dates', async () => {
-    const siteDir = path.join(__dirname, '__fixtures__', 'website');
-    const blogPostsFrench = await getBlogPosts(siteDir, {}, getI18n('fr'));
-    expect(blogPostsFrench).toHaveLength(10);
-    expect(blogPostsFrench[0]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"23 juillet 2023"`,
-    );
-    expect(blogPostsFrench[1]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"6 mars 2021"`,
-    );
-    expect(blogPostsFrench[2]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"5 mars 2021"`,
-    );
-    expect(blogPostsFrench[3]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"16 août 2020"`,
-    );
-    expect(blogPostsFrench[4]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"15 août 2020"`,
-    );
-    expect(blogPostsFrench[5]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"27 février 2020"`,
-    );
-    expect(blogPostsFrench[6]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"27 février 2020"`,
-    );
-    expect(blogPostsFrench[7]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"2 janvier 2019"`,
-    );
-    expect(blogPostsFrench[8]!.metadata.formattedDate).toMatchInlineSnapshot(
-      `"1 janvier 2019"`,
-    );
-  });
-
   it('handles edit URL with editLocalizedBlogs: true', async () => {
     const siteDir = path.join(__dirname, '__fixtures__', 'website');
     const blogPosts = await getBlogPosts(siteDir, {editLocalizedFiles: true});
@@ -476,11 +441,6 @@ describe('blog plugin', () => {
     // We know the file exists and we know we have git
     const result = getFileCommitDate(noDateSourceFile, {age: 'oldest'});
     const noDateSourceTime = result.date;
-    const formattedDate = Intl.DateTimeFormat('en', {
-      day: 'numeric',
-      month: 'long',
-      year: 'numeric',
-    }).format(noDateSourceTime);
 
     expect({
       ...getByTitle(blogPosts, 'no date').metadata,
@@ -494,7 +454,6 @@ describe('blog plugin', () => {
       description: `no date`,
       authors: [],
       date: noDateSourceTime,
-      formattedDate,
       frontMatter: {},
       tags: [],
       prevItem: undefined,

packages/docusaurus-plugin-content-blog/src/blogUtils.ts

@@ -164,25 +164,6 @@ export function parseBlogFileName(
   return {date: undefined, text, slug};
 }
 
-function formatBlogPostDate(
-  locale: string,
-  date: Date,
-  calendar: string,
-): string {
-  try {
-    return new Intl.DateTimeFormat(locale, {
-      day: 'numeric',
-      month: 'long',
-      year: 'numeric',
-      timeZone: 'UTC',
-      calendar,
-    }).format(date);
-  } catch (err) {
-    logger.error`Can't format blog post date "${String(date)}"`;
-    throw err;
-  }
-}
-
 async function parseBlogPostMarkdownFile({
   filePath,
   parseFrontMatter,
@@ -289,11 +270,6 @@ async function processBlogSourceFile(
   }
 
   const date = await getDate();
-  const formattedDate = formatBlogPostDate(
-    i18n.currentLocale,
-    date,
-    i18n.localeConfigs[i18n.currentLocale]!.calendar,
-  );
 
   const title = frontMatter.title ?? contentTitle ?? parsedBlogFileName.text;
   const description = frontMatter.description ?? excerpt ?? '';
@@ -348,7 +324,6 @@ async function processBlogSourceFile(
       title,
       description,
       date,
-      formattedDate,
       tags: normalizeFrontMatterTags(tagsBasePath, frontMatter.tags),
       readingTime: showReadingTime
         ? options.readingTime({

packages/docusaurus-plugin-content-blog/src/plugin-content-blog.d.ts

@@ -192,11 +192,6 @@ yarn workspace v1.22.19image` is a collocated image path, this entry will be the
      * into a string.
      */
     readonly date: Date;
-    /**
-     * Publish date formatted according to the locale, so that the client can
-     * render the date regardless of the existence of `Intl.DateTimeFormat`.
-     */
-    readonly formattedDate: string;
     /** Full link including base URL. */
     readonly permalink: string;
     /**