---
title: insertBefore
framework: TVMLKit JS
role: symbol
role_heading: Instance Method
platforms: [tvOS 13.0+, Safari Desktop 10.0+, Safari Mobile 10.0+]
path: tvmljs/node/1632155-insertbefore
---

# insertBefore

## Declaration

```data
Node insertBefore(
    in Node newChild, 
    in optional Node refChild
);
```

```data
Node insertBefore(
    Node newChild, 
    Node? refChild
);
```