in lib/h3core.js [1697:1706]
export function cellToVertex(h3Index, vertexNum) {
const [lower, upper] = h3IndexToSplitLong(h3Index);
const vertexIndex = C._malloc(SZ_H3INDEX);
try {
throwIfError(H3.cellToVertex(lower, upper, vertexNum, vertexIndex));
return validateH3Index(readH3IndexFromPointer(vertexIndex));
} finally {
C._free(vertexIndex);
}
}