Remove deprecated markdownItPlugins plugin interface

CHANGELOG.md

@@ -15,6 +15,10 @@
 - Upgrade to PostCSS 8 ([#260](https://github.com/marp-team/marpit/issues/260), [#284](https://github.com/marp-team/marpit/pull/284))
 - Upgrade Node and dependent packages to the latest version ([#285](https://github.com/marp-team/marpit/pull/285))
 
+### Removed
+
+- Remove deprecated `markdownItPlugins`, the getter of plugin interface for markdown-it ([#286](https://github.com/marp-team/marpit/pull/286))
+
 ## v1.6.4 - 2021-02-06
 
 ### Fixed

index.d.ts

@@ -73,9 +73,6 @@ declare namespace Marpit {
     }
     readonly options: Options
 
-    /** @deprecated A plugin interface for markdown-it is deprecated and will remove in future version. Instead, wrap markdown-it instance when creating Marpit by `new Marpit({ markdown: markdownItInstance })`. */
-    readonly markdownItPlugins: (md: any) => void
-
     protected lastComments: RenderResult['comments'] | undefined
     protected lastGlobalDirectives: { [directive: string]: any } | undefined
     protected lastSlideTokens: any[] | undefined

src/marpit.js

@@ -132,24 +132,6 @@ class Marpit {
     }
   }
 
-  /**
-   * The plugin interface of markdown-it for current Marpit instance.
-   *
-   * This is useful to integrate Marpit with the other markdown-it based parser.
-   *
-   * @deprecated A plugin interface for markdown-it is deprecated and will
-   *     remove in future version. Instead, wrap markdown-it instance when
-   *     creating Marpit by `new Marpit({ markdown: markdownItInstance })`.
-   * @type {Function}
-   * @readonly
-   */
-  get markdownItPlugins() {
-    console.warn(
-      'Deprecation warning: A plugin interface for markdown-it provided by `markdownItPlugins` is deprecated and will remove in next major version. Instead, wrap markdown-it instance when creating Marpit by `new Marpit({ markdown: markdownItInstance })`.'
-    )
-    return this.applyMarkdownItPlugins.bind(this)
-  }
-
   /** @private */
   applyMarkdownItPlugins(md) {
     this.markdown = md

test/marpit.js

@@ -158,20 +158,6 @@ describe('Marpit', () => {
     })
   })
 
-  describe('[DEPRECATED] get #markdownItPlugins', () => {
-    it('provides markdown-it plugins with its compatible interface', () => {
-      const marpit = new Marpit()
-      marpit.themeSet.add('/* @theme foobar */')
-
-      const md = new MarkdownIt().use(marpit.markdownItPlugins)
-      expect(marpit.markdown).toBe(md)
-      expect(md.marpit).toBe(marpit)
-
-      md.render('<!-- theme: foobar -->')
-      expect(marpit.lastGlobalDirectives.theme).toBe('foobar')
-    })
-  })
-
   describe('#render', () => {
     it('returns the object contains html, css, and comments', () => {
       const markdown = '# Hello'