govuk-frontend/dist/govuk/components/header/macro-options.json

GOV.UK Frontend contains the code you need to start building a user interface for government platforms and services.

[
    {
        "name": "homepageUrl",
        "type": "string",
        "required": false,
        "description": "The URL of the homepage. Defaults to the GOV.UK homepage."
    },
    {
        "name": "productName",
        "type": "string",
        "required": false,
        "description": "Product name, used when the product name follows on directly from ‘GOV.UK’. For example, GOV.UK Pay or GOV.UK Design System. In most circumstances, you should use the [Service navigation component](https://design-system.service.gov.uk/components/service-navigation/)."
    },
    {
        "name": "containerClasses",
        "type": "string",
        "required": false,
        "description": "Classes for the container, useful if you want to make the header fixed width."
    },
    {
        "name": "classes",
        "type": "string",
        "required": false,
        "description": "Classes to add to the header container."
    },
    {
        "name": "attributes",
        "type": "object",
        "required": false,
        "description": "HTML attributes (for example data attributes) to add to the header container."
    }
]