[**BlockSuite API Documentation**](../../../../README.md)

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[BlockSuite API Documentation](../../../../README.md) / [@blocksuite/std](../../README.md) / [gfx](../README.md) / compareLayer

# Function: compareLayer()

> **compareLayer**(`a`, `b`): `SortOrder`

A comparator function for sorting elements in the surface.
SortOrder.AFTER means a should be rendered after b and so on.

## Parameters

### a

`GfxModel` | `GfxLocalElementModel`

### b

`GfxModel` | `GfxLocalElementModel`

## Returns

`SortOrder`