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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Getting All Children of a Node with children

Shifat Kabir
Shifat Kabir
5,443 Points

Problem about children property

When I use that: const lis = listUl.children; Console give me that: Uncaught ReferenceError: listUl is not defined at app.js:9 But if I use that: const lis = document.getElementsByTagName('li'); Its work perfectly.

1 Answer

Steven Parker
Steven Parker
220,378 Points

You must define "listUl" first, before you can use it to reference the "children" attribute.

But your second solution saves a step and is more concise anyway.

Hi Steven,

How is the second solution of Shifat Kabir saves a step and is more concise? If you can elaborate, please so I can have an idea. Thanks!

Steven Parker
Steven Parker
220,378 Points

The single-line solution works because it gets a reference to the child elements directly (the "li" elements) and skips the need for a reference to the parent (the "listUl"),