docs: improve Node example

graphql/examples/node/pokemon.js

@@ -18,28 +18,30 @@ It gets:
   - flavor text
 */
 
-// Node doesn't implement fetch so we have to import it
-const fetch =require("node-fetch");
+const fetch = require("node-fetch")
 
-async function fetchGraphQL(operationsDoc, operationName, variables) {
+async function fetchGraphQL(query, variables, operationName) {
   const result = await fetch(
-    "http://localhost:80/graphql/v1beta",
+    "https://beta.pokeapi.co/graphql/v1beta",
     {
       method: "POST",
       body: JSON.stringify({
-        query: operationsDoc,
+        query: query,
         variables: variables,
         operationName: operationName
       })
     }
-  );
+  )
 
-  return await result.json();
+  return await result.json()
 }
 
-const operationsDoc = `
-  query pokemon_details {
-    species: pokemon_v2_pokemonspecies(where: {name: {_eq: "staryu"}}) {
+
+
+function fetchPokemon_details(name="starmie") {
+  const query = `
+    query pokemon_details($name: String) {
+      species: pokemon_v2_pokemonspecies(where: {name: {_eq: $name}}) {
         name
         base_happiness
         is_legendary
@@ -102,26 +104,22 @@ const operationsDoc = `
         }
       }
     }
-`;
+  `
 
-function fetchPokemon_details() {
   return fetchGraphQL(
-    operationsDoc,
-    "pokemon_details",
-    {}
-  );
+    query,
+    {"name": name},
+    "pokemon_details"
+  )
 }
 
-async function startFetchPokemon_details() {
-  const { errors, data } = await fetchPokemon_details();
-
+async function main() {
+  const pokemon = process.argv.slice(2)[0];
+  const { errors, data } = await fetchPokemon_details(pokemon)
   if (errors) {
-    // handle those errors like a pro
-    console.error(errors);
+    console.error(errors)
+  }
+  console.log(JSON.stringify(data, null, 2))
 }
 
-  // do something great with this precious data
-  console.log(data);
-}
-
-startFetchPokemon_details();
+main()