@nestjs/graphql/dist/utils/normalize-resolver-args.js

Nest - modern, fast, powerful node.js web framework (@graphql)

import { isType } from 'graphql';
export function normalizeResolverArgs(args) {
    // Reference resolver args don't have args argument (3 args instead of 4)
    const isReferenceResolver = args.length === 3;
    // Resolve type args don't have args argument and the last argument is the parent object type
    const isResolveType = !isReferenceResolver && isType(args[args.length - 1]);
    // Only create a new array when we need to insert undefined at position 1
    // This avoids array allocation for the common 4-argument case
    if (isReferenceResolver || isResolveType) {
        // Insert undefined at position 1: [root, ctx, info] -> [root, undefined, ctx, info]
        return [args[0], undefined, args[1], args[2], args[3]];
    }
    // Return original array for the common case (no mutation needed)
    return args;
}