Function assertNodeType

static/katex/katex.mjs:5976–5985

* Asserts that the node is of the given type and returns it with stricter * typing. Throws if the node's type does not match.

(node, type)

 * typing. Throws if the node's type does not match.
 */
function assertNodeType(node, type) {
  const typedNode = checkNodeType(node, type);

  if (!typedNode) {
    throw new Error(`Expected node of type ${type}, but got ` + (node ? `node of type ${node.type}` : String(node)));
  } // $FlowFixMe: Unsure why.


  return typedNode;
}
/**
 * Returns the node more strictly typed iff it is of the given type. Otherwise,
 * returns null.