When removing an item from FluidGrid, it causes a clientHeight error

[KevinGhadyani-minted]

If I delete an item from the grid (for instance, an image in a photo gallery), it seems to be thinking that element still exists and causes a "can't find .clientHeight of undefined" error.

This might have something to do with it storing children locally and then not looking for changes in children when an update occurs.

[KevinGhadyani-minted]

Actually, that code appears to already exist:
https://github.com/AntonRublev360/react-fluid-grid/blob/master/src/FluidGrid.js#L34

So now I'm not sure what's causing this.

[KevinGhadyani-minted]

I traced this further. We're pulling this.items, but we're not updating this value after this.props.children has changed even if everything else is being recomputed.

We end up in a situation like this where this.items has a null element:

A quick fix would be to filter out null elements from items in this.arrangeItems(). A proper fix would be to add another function which recomputes this.items after componentDidUpdate before initializing columns etc.

Maybe call this.renderChildren() first on componentDidUpdate?