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[@salesforce/b2c-tooling-sdk](../../modules.md) / [scaffold](../index.md) / insertBefore

# Function: insertBefore()

> **insertBefore**(`existingContent`, `newContent`, `marker`): `string`

Defined in: [packages/b2c-tooling-sdk/src/scaffold/merge.ts:204](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/e7c16f1ae423da0aa47b3e10be88f9770b53619b/packages/b2c-tooling-sdk/src/scaffold/merge.ts#L204)

Insert text before a marker in existing content

## Parameters

### existingContent

`string`

The existing text content

### newContent

`string`

Content to insert

### marker

`string`

Marker string to find

## Returns

`string`

Updated content