您可以使用创建对象，
reduce然后
Object.values在该对象上使用。
let rawData = [ { name : 'Animals', id : 10}, { name : 'Batteries', id : 7}, { name : 'Baggage', id : 12 }, { name : 'Cake', id : 7},]let data = rawData.reduce((r, e) => { // get first letter of name of current element let group = e.name[0]; // if there is no property in accumulator with this letter create it if(!r[group]) r[group] = {group, children: [e]} // if there is push current element to children array for that letter else r[group].children.push(e); // return accumulator return r;}, {})// since data at this point is an object, to get array of values// we use Object.values methodlet result = Object.values(data)console.log(result)
