If the element has children insert a new div "i-new-element". parent2 and parent3 get a new div.
child3-parent3 has children but doesn't get a new giant. Why?
How can I make it possible for children who have children to get a new div?
it should look like:
<div id="child3-parent3">
<div id="i-new-element"></div>
<div id="child3"></div>
<div id="child4"></div>
</div>
var container = document.getElementById("container").querySelectorAll("#container > *");
container.forEach(function(div) {
{
if (div.hasChildNodes()) {
let parentElement = div;
let theFirstChild = parentElement.firstChild;
let newElement = document.createElement("div")
newElement.id = "i-new-eleemnt"
parentElement.insertBefore(newElement, theFirstChild)
}
}
});<div id="container">
<div id="parent1"></div>
<div id="parent2">
<div id="child1"></div>
<div id="child2"></div>
<div id="child3-parent3">
<div id="child3"></div>
<div id="child4"></div>
</div>
</div>
<div id="parent3">
<div id="child5"></div>
<div id="child6"></div>
</div>
</div>Using
var container = document.getElementById("container");
var elements = container.querySelectorAll(":scope *");
instead of
var container = document.getElementById("container").querySelectorAll("#container > *");
should fix your problem.
var container = document.getElementById("container");
var elements = container.querySelectorAll(":scope *");
elements.forEach(function(div){
{
if (div.hasChildNodes()) {
let parentElement = div;
let theFirstChild = parentElement.firstChild;
let newElement = document.createElement("div")
newElement.id = "i-new-eleemnt"
parentElement.insertBefore(newElement, theFirstChild)
}
}
});<div id="container">
<div id="parent1"></div>
<div id="parent2">
<div id="child1"></div>
<div id="child2"></div>
<div id="child3-parent3">
<div id="child3"></div>
<div id="child4"></div>
</div>
</div>
<div id="parent3">
<div id="child5"></div>
<div id="child6"></div>
</div>
</div>Edit: Further information about the :scope CSS pseudo-class can be found here and here.
I believe your problem is the following, even it is not described well in your sample HTML:
<div id="parent1"></div> per instance is actually not an empty node but contains some text i.e. <div id="parent1">some text here</div>.
You might believe or not, but node.hasChildNodes() will count any text as a child node (text node, nodeType = 3), so it will always return true is any text is present.
To avoid that, you can filter the text nodes first or just use this workaround:
Replace this line:
if (div.hasChildNodes()) {
with that line:
if (div.children.length) {
children property is not counting text nodes.
That's all you have to do, I believe.
var container = document.querySelectorAll("#container > *");
container.forEach(function(div) {
{
if (div.children.length) {
let parentElement = div;
let theFirstChild = parentElement.children[0];
let newElement = document.createElement("div")
newElement.id = "i-new-eleemnt";
newElement.innerHTML = 'i-new-eleemnt'
parentElement.insertBefore(newElement, theFirstChild);
}
}
});<div id="container">
<div id="parent1">parent1</div>
<div id="parent2">parent2
<div id="child1">child1</div>
<div id="child2">child2</div>
<div id="child3-parent3">child3-parent3
<div id="child3">child3</div>
<div id="child4">child4</div>
</div>
</div>
<div id="parent3">parent3
<div id="child5">child5</div>
<div id="child6">child6</div>
</div>
</div>