access first child with optional chaining #49
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A node does not always have a first child. As an example, empty `<styles>` in a Svelte components throw an error because the first child is accessed directly.
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A node does not always have a first child. As an
example, empty
<styles>in a Svelte componentsthrow an error because first child attributes are
accessed directly even if the first child is undefined (or null).
This may also fix #40