---
url: "https://vueda.dev/v3/reference/api/js/utils/fieldMappings/functions/mergeManyFieldMappings.md"
title: "mergeManyFieldMappings"
---

# mergeManyFieldMappings

## Overview

Merge custom field mappings used for many-to-many selections.

## Signature

`mergeManyFieldMappings(customMappings)`

### Parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| <span id="param-customMappings">customMappings</span> | `object` | yes | Additional mappings keyed by field type. |

### Returns

`The updated many-to-many field mappings.`

## Examples

```js
mergeManyFieldMappings({
    MyCustomField: {
        MyCustomField: { widget: MyCustomWidget, fieldProps: { manyComponent: MyCustomField }, default: true },
    },
});
```

## Source

`client/lib/utils/fieldMappings.js:964`