[Home](./index.md) > [@apextoaster/js-utils](./js-utils.md) > [pushMergeMap](./js-utils.pushmergemap.md) ## pushMergeMap() function Merge the provided maps into a new map, merging keys that already exist by pushing new items. Signature: ```typescript export declare function pushMergeMap(...args: Array>>): Map>; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | args | Array<Map<TKey, TVal | Array<TVal>>> | | Returns: `Map>`