Selecting a last child in javascript

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不知归路
不知归路 2020-12-21 01:39

I have a handle on an Un-ordered List (for my example i will call the handle Var1) and would like to be able to assign its last li to a variable. I tried Lastli = var

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  • 2020-12-21 02:03

    you can select all 'li' and take the last one. Something like:

    var myLi = document.getElementsByTagName('li');
    var lastLi = myLi[myLi.length-1];
    
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  • 2020-12-21 02:06

    either ulReference.children[ulReference.children.length -1] or ulReference.childNodes[ulReference.childNodes.length -1]. The difference between the two can be found here

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  • 2020-12-21 02:09

    You can select the parent element and use the lastChild property.

    var container = document.getElementsByTagName("ul")[0];
    var lastchild = container.lastChild;
    

    Or you select all the items into an array and get the last item. Here is a quick example:

     var items = document.querySelectorAll("li");
     var lastchild = items[items.length-1];
    
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  • 2020-12-21 02:22

    Try this: .childNodes[childNodes.length - 1]

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  • 2020-12-21 02:27

    Lets consider an example

    <ul >
        <li>Coffee</li>
        <li>Tea</li>
        <li>Milk</li>
    </ul>
    

    To get the last child of the list you can simply make use of queryselector

    document.querySelector('li:last-child'); //this will return Milk which is the last child of the list
    document.querySelector('li:first-child') OR document.querySelector('li'); //both will give you the first child of the list
    

    Suppose you want the n-th child for that you can use the following syntax:

    document.querySelector('li:nth-child(2)');  //it will return the second child (here Tea)
    

    If you want all the list item in the given list:

    document.getElementsByTagName('li') //(Will return the whole list)here i am using tagname. It can be also applied on classname or element id
    
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