[Solved] This query in GraphQL Playground returns an error:query { book(id: "3") { title, author } }What is the likely syntax issue? | GraphQL

GraphQL - Basics and Philosophy

This query in GraphQL Playground returns an error:

query { book(id: "3") { title, author } }

What is the likely syntax issue?

AField names must be capitalized

BMissing parentheses around id argument

CThe query keyword is missing

DCommas are not allowed between fields in GraphQL queries

Step-by-Step Solution

Solution:

Step 1: Review GraphQL field syntax
Fields inside braces are separated by spaces or new lines, not commas.
Step 2: Identify the error
Commas between fields cause syntax errors in GraphQL queries.
Final Answer:
Commas are not allowed between fields in GraphQL queries -> Option D
Quick Check:
Syntax error = Commas between fields [OK]

Quick Trick: Do not use commas between fields in GraphQL queries [OK]

Common Mistakes:

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This query in GraphQL Playground returns an error: