I am trying to just access all child elements of a container. I created an ES6 class for this. I need class approach as per my project requirement. My target is, when i click on any child element, all the child elements needs to be selected. As an example now, i given a red border to all child elements when i click on any child element. If you see my code, following line is the main thing i need help let children = parent.querySelectorAll(".child"); now i used .child class here. But how can i use this.children here. The comple line should be like this let children = parent.querySelectorAll(this.children);. How can i achieve this. My code is as follows. If i get this, it will be very helpfull. Hopes anyone can be help me on it. Thanks in Advance!
class Selector{
constructor(parents, children) {
this.parents= document.querySelectorAll(parents);
this.children= document.querySelectorAll(children);
this.selectall=()=>{
this.children.forEach((elem)=>{
elem.addEventListener("click",(e)=>{
let parent = e.target.parentElement;
let children = parent.querySelectorAll(".child");
children.forEach((elem)=>{elem.style.border="2px solid red"});
})
})
}
}
}
let one = new Selector(".parent",".child");
one.selectall();.parent {font-family:Arial, Helvetica, Sans-serif;}<ul class="parent">
<li class="child">One</li>
<li class="child">Two</li>
<li class="child">Three</li>
</ul>
<ul class="parent">
<li class="child">One</li>
<li class="child">Two</li>
<li class="child">Three</li>
</ul>Solution 1 (If parent has all children with child class):
Instead of
let children = parent.querySelectorAll(".child");
Try this
let children = Array.from(parent.children);
Solution 2 (If parent has children with class other than child)
Store the child class as well.
class Selector {
constructor(parents, children) {
this.parents = document.querySelectorAll(parents);
this.childrenClass = children;
this.children = document.querySelectorAll(children);
this.selectall = () => {
this.children.forEach((elem) => {
elem.addEventListener("click", (e) => {
let parent = e.target.parentElement;
let children = parent.querySelectorAll(this.childrenClass);
children.forEach((elem) => {
elem.style.border = "2px solid red";
});
});
});
};
}
}
let one = new Selector(".parent", ".child");
one.selectall();