To use Zeus with JavaScript as an autocomplete tool you need to install TypeScript, run the Zeus CLI, and then transform the result to JS using tsc
$ npm i -D typescript
# OR
# yarn add -D typescript
Generate Zeus:
$ zeus schema.graphql ./
and transform it using Typescript:
$ npx tsc ./zeus/*.ts --declaration --target es5 --skipLibCheck
# OR
# yarn tsc ./zeus/*.ts --declaration --target es5 --skipLibCheck
This will generate an out.d.ts file so that you can have auto-completion.