How to fetch Wikidata using JavaScript and SPARQL query

We can use wikidata-sdk to get the data from the Wikidata.

1. Import the wikidata-sdk package as variable wdk.

const wdk = require('wikidata-sdk')

2. Write your SPARQL query

const sparql = `
SELECT ?item ?itemLabel
WHERE {
  ?item wdt:P31 wd:Q6256;
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}
`

3. Get the url and parsed body

const [baseUrl, body] = wdk.sparqlQuery(sparql).split('?')

4. Use axios to POST and get the response

const axios = require('axios')

const { data } = await axios.post(url, body)

console.log(data)

So let’s combine the code together.

const axios = require('axios')
const wdk = require('wikidata-sdk')
const sparql = `
SELECT ?item ?itemLabel
WHERE {
  ?item wdt:P31 wd:Q6256;
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}
`

const [url, body] = wdk.sparqlQuery(sparql).split('?')

const { data } = await axios.post(url, body)

console.log(data)

We can run the above code in runkit and inspect the response:

Or you may click the following link to play with the source code.

https://runkit.com/calpa/example-of-fetching-all-countries-from-wikidata