all,
I have a technical task from one company. As I am starting only the task is quiet a difficult for me. Tha flat array is:
[
{ id: '1', name: 'name 1', parentId: null },
{ id: '2', name: 'name 2', parentId: null },
{ id: '2_1', name: 'name 2_1', parentId: '2' },
{ id: '2_2', name: 'name 2_2', parentId: '2' },
{ id: '3', name: 'name 3', parentId: null },
{ id: '4', name: 'name 4', parentId: null },
{ id: '5', name: 'name 5', parentId: null },
{ id: '6', name: 'name 6', parentId: null },
{ id: '7', name: 'name 7', parentId: null },
{ id: '1_1', name: 'name 1_1', parentId: '1' },
{ id: '1_2', name: 'name 1_2', parentId: '1' },
{ id: '1_3', name: 'name 1_3', parentId: '1' },
{ id: '1_4', name: 'name 1_4', parentId: '1' },
{ id: '1_5', name: 'name 1_5', parentId: '1' },
{ id: '2_1_1', name: 'name 2_1_1', parentId: '2_1' },
{ id: '2_1_2', name: 'name 2_1_2', parentId: '2_1' },
{ id: '2_1_3', name: 'name 2_1_3', parentId: '2_1' },
{ id: '2_1_4', name: 'name 2_1_4', parentId: '2_1' },
{ id: '2_1_5', name: 'name 2_1_5', parentId: '2_1' },
].
I need to make it as a tree and include it to input list and to have opportunity to open and close children lists. Please help
While creating my solution, I assumed you wanted a accordion-like structure from your data which can be opened or closed based on whether they have children or not. Here is a code snippet for handling link addition.
arr.forEach(a => {
const div = document.createElement("div")
if (a.parentId === null) {
div.classList.add("parent")
div.setAttribute("id", `id${a.id}`)
div.innerText = a.name
tree.appendChild(div)
}
else {
const parent = document.getElementById(`id${a.parentId}`)
if (!parent.classList.contains("parent")) {
parent.classList.add("parent")
}
console.log(`${a.id} `, parent)
let childContainer = null
if (parent.childElementCount === 0) {
childContainer = document.createElement("div")
childContainer.classList.add("childContainer")
parent.appendChild(childContainer)
childContainer.classList.add("hidden")
}
else {
childContainer = document.querySelector(`#id${a.parentId} .childContainer`)
}
div.classList.add("child")
div.setAttribute("id", `id${a.id}`)
div.innerText = a.name
childContainer.appendChild(div)
}
})
Full solution: Codepen link
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.