I have a JSON object of an unknown size, number of keys, and depth level. Example:
{
"domains": [
{
"url_part": "domainOne.com",
"children": [
{
"url_part": "one",
"children": [
{
"url_part": "a",
"children": [
{
"url_part": "page1",
"children": []
},
{
"url_part": "page2",
"children": []
}
]
},
{
"url_part": "b",
"children": []
},
{
"url_part": "c",
"children": []
}
]
},
{
"url_part": "two",
"children": [
{
"url_part": "a",
"children": [
{
"url_part": "page1",
"children": []
},
{
"url_part": "page2",
"children": []
}
]
}
]
}
]
},
{
"url_part": "domainTwo.com",
"children": []
}
]
}
And I want to have a page initially just have a button for each domain, then when you click each button it expands one layer down:
domainOne.com
domainTwo.com
When you click on DomainOne.com turns into:
domainOne.com
--one
--two
domainTwo.com
I am able to create a button for each of the domains, but am only able to reach one level down when it comes to making buttons for the children.
I am passing in:
- the parentJSON (domains["domainone.com"] in the first call)
- the treelevel (to keep track of indentation)
- the currentURL (for naming and later uses)
- the "aboveDiv", the div in which all of the children are appended under
The function that I'm trying to use recursively looks like this:
function childrenButtons(parentJSON, level, currentURL, aboveDiv){
if (parentJSON["children"] == "[]") {
//if the JSON you are passing in doesnt have children, this is the end
console.log(" no more kids to show ");
return 0;
}
else {
for (let j = 0; j < parentJSON["children"].length; j ) {
button.addEventListener("click", function () {
////for each child, create their own div
const childDivElement = document.createElement("div");
const domainDivElementID = "childDivElement" j;
childDivElement.setAttribute("id", domainDivElementID);
aboveDiv.append(childDivElement);
//create and add button with name = full path of button
const button = document.createElement("button");
const currChild = domains[i]["children"][j]["url_part"];
fullURL = currentURL "/" currChild;
button.innerHTML = fullURL;
button.style.marginLeft = level*20;
childDivElement.append(button);
let newParentJSON = parentJSON["children"][j]
console.log(parentJSON["children"][j]);
treeLevel ;
return childrenButtons(newParentJSON, treeLevel, fullURL, childDivElement);
}, false);
}
}
}
CodePudding user response:
You can do that, with event delegation...
const data =
{ domains:
[ { url_part: 'domainOne.com', children:
[ { url_part: 'one', children:
[ { url_part: 'a', children:
[ { url_part: 'page1', children: [] }
, { url_part: 'page2', children: [] }
] }
, { url_part: 'b', children: [] }
, { url_part: 'c', children: [] }
] }
, { url_part: 'two', children:
[ { url_part: 'a', children:
[ { url_part: 'page1', children: [] }
, { url_part: 'page2', children: [] }
] } ] } ] }
, { url_part: 'domainTwo.com', children: [] }
] }
const eDomains = document.querySelector('#domains-div')
addButtons( data.domains, eDomains, '' )
eDomains.onclick = evt =>
{
if (!evt.target.matches('button')) return
console.clear()
console.log( evt.target.textContent )
}
function addButtons( jsoList, elm, path )
{
let UL = elm.appendChild(document.createElement('ul'))
for ( let {url_part,children } of jsoList )
{
let LI = UL.appendChild( document.createElement('li'))
LI.appendChild( document.createElement('button')).textContent = path url_part
if (children.length > 0)
addButtons( children, LI, path url_part '/')
}
}
ul { list-style: none; padding-left: 1em; }
button { min-width: 6em; margin: .1em 0; text-align: left; }
<div id="domains-div"></div>