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JavaScript DOM Scripting By Example Adding and Removing Names Removing Names

Gal Parselany
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Gal Parselany
Full Stack JavaScript Techdegree Graduate 26,281 Points
Posted by Gal Parselany
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Gal Parselany
Full Stack JavaScript Techdegree Graduate 26,281 Points

const ul = li.parentNode - why we need this?

why we need this while we already declare the UL in the global scope?

its the same variable

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

The "ul" in the handler is not the same variable, it is a new variable with a scope limited to the conditional block it is created in.

Now the global one may contain a reference to the same element, so it could be used instead, but acquiring all the references by traversal in the handler is more of a "best practice". It could avoid future trouble if someone modifying the global code was not aware that the handler code relied on it.