In our project we have the need for forbidding spaces before the ">" symbol in a start tag. For example the following should not be allowed:

<RectangleSelection
    minWidth={150}
    minHeight={50} >
    {children}
</RectangleSelection>

In comparison the following should not result in an error:

<RectangleSelection
    minWidth={150}
    minHeight={50}>
    {children}
</RectangleSelection>