README.md

nuxt-jsonld

A Nuxt.js module to manage JSON-LD in Vue component.

Please read nuxt-jsonld@v1 document if you are using Nuxt2.

Installation

$ yarn add nuxt-jsonld
# or
$ npm install nuxt-jsonld

// nuxt.config.ts
export default defineNuxtConfig({
  modules: ['nuxt-jsonld'],
});

Usage

Composition API

You can call useJsonld with a json object.
Alternatively, you can pass a function for a reactive json, just as useHead composable.

You can use useJsonld without importing, since it is provided as Nuxt auto-imports functions.
Of course, you can import explicitly from #jsonld.

<script lang="ts" setup>
// You don't need to import explicitly.
// import { useJsonld } from '#jsonld';

// just pass a jsonld object for static jsonld
useJsonld({
  '@context': 'https://schema.org',
  '@type': 'Thing',
  name: 'static json',
});

// pass a function which returns a jsonld object for reactive jsonld
const count = ref(0);
const countUp = () => {
  count.value += 1;
};
useJsonld(() => ({
  '@context': 'https://schema.org',
  '@type': 'Thing',
  name: `reactive json: count is ${count.value}`,
}));
</script>

Options API

Make a jsonld method to your Vue components and return structured data object.

<script lang="ts">
import type { WithContext, ListItem } from 'schema-dts';

export default defineComponent({
  data() {
    return {
      breadcrumbs: [
        {
          url: 'https://example.com',
          text: 'top page',
        },
        {
          url: 'https://example.com/foo',
          text: 'foo',
        },
        {
          url: 'https://example.com/foo/bar',
          text: 'bar',
        },
      ],
    };
  },
  jsonld(): WithContext<ListItem> {
    const items = this.breadcrumbs.map((item, index) => ({
      '@type': 'ListItem',
      position: index + 1,
      item: {
        '@id': item.url,
        name: item.text,
      },
    }));
    return {
      '@context': 'https://schema.org',
      '@type': 'BreadcrumbList',
      itemListElement: items,
    };
  },
});
</script>

Options

disableOptionsAPI

Options API jsonld method is implemented using global mixin.
You can disable it if you don't use it.
(default: false)

// nuxt.config.ts
export default defineNuxtConfig({
  modules: ['nuxt-jsonld'],
  'nuxt-jsonld': { disableOptionsAPI: true },
});

Or

// nuxt.config.ts
export default defineNuxtConfig({
  modules: [['nuxt-jsonld', { disableOptionsAPI: true }]],
});

Tips

Hide JSON-LD

If you don't need JSON-LD tag, just return null.

useJsonld(() => {
  if (!props.product) {
    return null;
  }
  return {
    '@context': 'https://schema.org',
    '@type': 'Product',
    name: this.product.name,
  };
});

Multiple JSON-LD from one component

You can return multiple json data as an array.

[
  {
    '@context': 'https://schema.org',
    '@type': 'BreadcrumbList',
    itemListElement: [
      /* breadcrumb items*/
    ],
  },
  {
    '@context': 'https://schema.org',
    '@type': 'NewsArticle',
    mainEntityOfPage: {
      /* article info */
    },
  },
];

Or use @graph notation. #247

Note: Safari will log an error to the console when using an array to describe multiple data. While the library functions correctly, please exercise caution if you are aggregating error logs with tools like Sentry. To avoid this issue, use @graph. #1280