Example2.js

// Build folders tree.
// Example how should result looks like 
// folderTree = {
//     folders: [{
//         folders: [{
//             id,
//             name,
//             folders: []
//         }]
//     }]
// };


const folders = [
    { id: 1, parent: null, name: 'Main videos' },
    { id: 2, parent: 1, name: 'Kitchen videos' },
    { id: 3, parent: 1, name: 'Garden videos' },
    { id: 4, parent: 3, name: 'Garden videos1' },
    { id: 5, parent: 3, name: 'Garden videos2' },
];