MongoDB Get collections storage sizes in GB sorted

get_collections_sizes.js

(() => {
    let datas = [];
db.getCollectionNames().forEach(colName => {
    let stats = db.getCollection(colName).stats();
    datas.push({
        colName,
        size : stats.storageSize,
        humanSize: (stats.storageSize / (1024*1024*1024)) + ' GB'
     });
    
    
    })
    return datas.sort((a,b) => {
          return b.size - a.size;
        });
})();