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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/2feab01f654eec77c6d702777ec2818472f131f1/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