const { groupByRange } = require("group-by-range");
const collection = [
{widgets: 1},
{widgets: 3},
{widgets: 7},
{widgets: 2},
{widgets: 8},
{widgets: 2},
]
const grouped = groupByRange(collection, [0, 5, 10], 'widgets');
/*
{
'0,5': [ { widgets: 1 }, { widgets: 3 }, { widgets: 2 }, { widgets: 2 } ],
'5,10': [ { widgets: 7 }, { widgets: 8 } ]
}
*/