To check if an element is a child of a parent with JavaScript, we can use the parent element's contains method. const contains = (parent, child) => { return parent !== child && parent. contains(child); };
getElementById('element-id') .
If you already have var parent = document.querySelector('.parent');
you can do this to scope the search to parent
's children:
parent.querySelector('.child')
The children
property returns an array of elements, like so:
parent = document.querySelector('.parent');
children = parent.children; // [<div class="child1">]
There are alternatives to querySelector
, like document.getElementsByClassName('parent')[0]
if you so desire.
Edit: Now that I think about it, you could just use querySelectorAll
to get decendents of parent
having a class name of child1
:
children = document.querySelectorAll('.parent .child1');
The difference between qS and qSA is that the latter returns all elements matching the selector, while the former only returns the first such element.
Just adding another idea you could use a child selector to get immediate children
document.querySelectorAll(".parent > .child1");
should return all the immediate children with class .child1
Element.querySelector() is the best way;
const parent = document.querySelector('.parent');
// Do anything next //When you want
parent.querySelector('.child1'); // <div class="child1">
You have a parent element, you want to get all child of specific attribute
1. get the parent
2. get the parent nodename by using parent.nodeName.toLowerCase()
convert the nodename to lower case e.g DIV will be div
3. for further specific purpose, get an attribute of the parent e.g parent.getAttribute("id")
. this will give you id
of the parent
4. Then use document.QuerySelectorAll(paret.nodeName.toLowerCase()+"#"_parent.getAttribute("id")+" input " );
if you want input children of the parent node
let parent = document.querySelector("div.classnameofthediv")
let parent_node = parent.nodeName.toLowerCase()
let parent_clas_arr = parent.getAttribute("class").split(" ");
let parent_clas_str = '';
parent_clas_arr.forEach(e=>{
parent_clas_str +=e+'.';
})
let parent_class_name = parent_clas_str.substr(0, parent_clas_str.length-1) //remove the last dot
let allchild = document.querySelectorAll(parent_node+"."+parent_class_name+" input")
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