@graphiql/react/src/editor/style/editor.css

[Changelog](https://github.com/graphql/graphiql/blob/main/packages/graphiql-react/CHANGELOG.md) | [API Docs](https://graphiql-test.netlify.app/typedoc/modules/graphiql_react.html) | [NPM](https://www.npmjs.com/package/@graphiql/react)

.graphiql-editor {
  height: 100%;
  position: relative;
  width: 100%;

  &.hidden {
    /* Just setting `display: none;` would break the editor gutters */
    left: -9999px;
    position: absolute;
    top: -9999px;
    visibility: hidden;
  }
}