js-libs-graphql-variables

• dynamic arguments, e.g. a selected item from a dropdown list, need to be stored in variables
• we need to define a $variableName and add it as a valid argument to the query
• we can then pass variableName: value into the function

query HeroNameAndFriends($episode: Episode) {
  hero(episode: $episode) {
    name
    friends {
      name
    }
  }
}
 
// The variable value is read from a dictionary, e.g. as a JSON file.
{
  "episode": "JEDI"
}
 
// Default values are supplied in the type declaration
query HeroNameAndFriends($episode: Episode = JEDI)