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![Kevin O'Donoghue](https://secure.gravatar.com/avatar/c83265dd55a9ef9d896a6f886e3c4ed7?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Kevin O'Donoghue
8,995 PointsIs this the correct usage of extending a class?
Hi,
I have made a mini dom manipulation library in codepen to test what I learned about js classes however after looking at the code it feels like a lot of boilerplate and wondered whether there is a better way to do what i'm doing.
https://codepen.io/matt3224/pen/wXZVgV?editors=0011
Any help much appreciated, Matt
1 Answer
![Steven Parker](https://uploads.teamtreehouse.com/production/profile-photos/969492/micro_tool_chess_set_2.jpg)
Steven Parker
230,274 PointsIf you just wanted to practice class structures it looks like you did a good job. Otherwise, I'm not quite sure what you're after. If I wanted functionality like this, I'd just load jQuery.
One issue caught my eye: there's no "getElementsByID" (plural) method. Since ID's must be unique, there's only a "getElementById" method that returns a single element.