How can the not selector in CSS be applied in JavaScript?

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To apply the not selector in JavaScript, you can use the querySelectorAll() method with the :not() selector.

For example, if you want to select all the li elements in a ul except for the first one, you can use the following code:

const allItems = document.querySelectorAll('ul li:not(:first-child)');

This will select all li elements in the ul that are not the first child.

Alternatively, you can also use the filter() method to filter out the elements you don't want:

const allItems = document.querySelectorAll('ul li');
const filteredItems = Array.from(allItems).filter(item => !item.matches('ul li:first-child'));

This will create an array of all li elements in the ul and then filter out the first child element.