Exclude markdownIt from vendor

[rbwilcoxon11]

What problem does this feature solve?

Currently, I have a huge bundle size because prism.js is included in my vendor build. I want to avoid the Mb cost...

What does the proposed changes look like?

Essentially, the markdownit component needs to be available to the asyncData instance directly. I was thinking I could just use require in asnycdata—not sure if this will actually work—but if it were an option in the module that would be a lot easier. Some ways to do that are discussed in the nextjs blog post. https://arunoda.me/blog/ssr-and-server-only-modules

I tried the second option but couldn't get it working... maybe someone had success with another one of the options?

_{This feature request is available on Nuxt.js community (#c125)}

[DitheringIdiot]

I'd like to second this. I'm trying to find a way to use markdown-it to preprocess my pages on generate.

[bayssmekanique]

I believe you can prevent markdown from injecting it's self into your pages:

// nuxt.config.js
  markdownit: {
    injected: false
  },

I use this on my blog and there is no markdownit or prismjs code in my vendor file.

[DitheringIdiot]

I just gave that a go and it does remove it from the vendor. But it also breaks my app because of when I'm parsing the markdown.

I get the markdown in asyncData then have this in my template:

<post-to-render :content="$md.render(post.body)" />

I just followed the Netlify CMS Nuxt Tutorial. But figured there must be a better way of doing it.

I'd really appreciate it if you could share how you preprocessed your markdown.

[bayssmekanique]

It's been a over a year since I wrote this code so it took me a bit to remember where it was all hiding. It turns out that I do still have to include markdownit and prismjs in the page level code, but not in the top level vendor code. I used Contentful as the CMS, so it's probably fairly similar in implementation to Netlify CMS.

<!-- _slug.vue -->
<template>
  <section class="blog-post">
    <p class="back-link">
      <nuxt-link to="/blog/">Back to Latest Blog Posts</nuxt-link>
      <a :href="'/blog/amp/' + post.slug + '/'">To AMP Version⚡</a>
    </p>

    <article>
      <div v-if="post.bannerImg" class="banner">
        <img :src="post.bannerImg.src" :alt="post.bannerImg.alt" :height="post.bannerImg.height" :width="post.bannerImg.width">
      </div>

      <h1>{{ post.title }}</h1>

      <div class="meta">
        <time :datetime="post.publishedAt">Published on {{ post.publishedAt | formatDate }}</time>
      </div>

      <div class="content" v-html="mdRender(post.content)"></div>
    </article>
  </section>
</template>

<script src="~/mixins/slug/slug.js"></script>
<style lang="scss">
@import "~/mixins/slug/slug.scss";
</style>

// slug.scss
@import "~/node_modules/prismjs/themes/prism-tomorrow.css";

.blog-post {
  .content {
    pre {
      margin-bottom: 1.4rem;
    }

    p code {
      color: $color-white;
      background-color: $color-bg-secondary;
      padding: .25rem .5rem;
      border-radius: .4rem;
    }

    pre {
      background-color: $color-bg-secondary;
      padding: 2rem;

      code {
        white-space: pre-wrap;
      }
      @include for-phone-only {
        padding: .5rem;
        overflow-x: scroll;

        code {
          white-space: pre;
        }
      }
    }
  }
 }

// slug.js
import MarkdownIt from 'markdown-it'
import MDPrism from 'markdown-it-prism'
import stripMd from '~/mixins/stripMd'
import { formatDate } from '~/mixins/filters'
import contentfulClient from '~/plugins/contentful'

const md = new MarkdownIt()
md.use(MDPrism)

const processPost = (post) => {
  return {
    post: {
      title: post.fields.title,
      slug: post.fields.slug,
      publishedAt: post.sys.createdAt,
      updatedAt: post.sys.updatedAt,
      description: post.fields.description,
      content: post.fields.content,
      bannerImg: post.fields.banner ? {
        src: 'https:' + post.fields.banner.fields.file.url,
        alt: post.fields.banner.fields.description,
        height: post.fields.banner.fields.file.details.image.height,
        width: post.fields.banner.fields.file.details.image.width
      } : null
    }
  }
}

export default {
  head () {
    const rawContent = stripMd(this.post.content)

    return {
      title: this.post.title,
      meta: [
        { hid: 'description', name: 'description', content: this.post.description }
      ],
      link: [
        { rel: 'canonical', href: `/blog/${this.post.slug}/` },
        { rel: 'amphtml', href: `/blog/amp/${this.post.slug}/` }
      ],
      script: [ ],
      __dangerouslyDisableSanitizers: ['script']
    }
  },
  filters: { formatDate },
  asyncData ({ params, error, payload }) {
    if (payload) return processPost(payload)

    return contentfulClient
      .getEntries({
        content_type: 'blogPost',
        'fields.slug': params.slug,
      })
      .then(entries => {
        if (entries.items.length == 0) {
          throw new Error('article not found')
        }
        return processPost(entries.items[0])
      })
      .catch(e => { error({ statusCode: 404, message: e.message }) })
  },
  methods: {
    mdRender (content) {
      if (!content) return ''
      return md.render(content)
    }
  }
}

[ghost]

I tried your solution but the markdown-it module stay in vendor app when i run webpack analyse

[madsh93]

Is there still no simple solution out there to render markdown on build? It seems silly to include this package when using static site generation.