---
title: insertRule
framework: webkitjs
role: pseudoSymbol
path: webkitjs/webkitcsskeyframesrule/1807093-insertrule
---

# insertRule

Adds a keyframe rule to the collection of keyframes.

## Declaration

```data
void insertRule (in DOMString rule);
```

## Parameters

- `rule`: A string representing a selector and keyframe, where the selector is a percentage or keyword and the keyframe is a block. The string must follow the format for keyframe blocks in the @-webkit-keyframes CSS rule.

## See Also

### Changing Rules

- [deleteRule](webkitjs/webkitcsskeyframesrule/1807097-deleterule.md)
- [findRule](webkitjs/webkitcsskeyframesrule/1807100-findrule.md)