Function assertNodeType

static/katex/katex.js:6010–6019

* 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) {
  var 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.