a.js

try {
      await new Promise((resolve, reject) => {
        index.browseObjects({
          query: '',
          facets: ['npm_dependencies.dependency'],
          maxValuesPerFacet: 36,
          attributesToRetrieve: [
            'objectID',
            'title',
            'description',
            'author',
            'template',
            'npm_dependencies'
          ],
          batch: batch => {
            if (hits.length >= 10000) {
              resolve()
              return
            } else {
              console.log('getting sandboxes', hits.length)
              hits = hits.concat(batch)
            }
          }
        })
      })
    } catch (e) {}