notifications-admin/app/templates/components/uk_components/fieldset/macro-options.json

[
    {
        "name": "describedBy",
        "type": "string",
        "required": false,
        "description": "One or more element IDs to add to the `aria-describedby` attribute, used to provide additional descriptive information for screenreader users."
    },
    {
        "name": "legend",
        "type": "object",
        "required": false,
        "description": "Options for the legend",
        "params": [
            {
                "name": "text",
                "type": "string",
                "required": true,
                "description": "If `html` is set, this is not required. Text to use within the legend. If `html` is provided, the `text` argument will be ignored."
            },
            {
                "name": "html",
                "type": "string",
                "required": true,
                "description": "If `text` is set, this is not required. HTML to use within the legend. If `html` is provided, the `text` argument will be ignored."
            },
            {
                "name": "classes",
                "type": "string",
                "required": false,
                "description": "Classes to add to the legend."
            },
            {
                "name": "isPageHeading",
                "type": "boolean",
                "required": false,
                "description": "Whether the legend also acts as the heading for the page."
            }
        ]
    },
    {
        "name": "classes",
        "type": "string",
        "required": false,
        "description": "Classes to add to the fieldset container."
    },
    {
        "name": "attributes",
        "type": "object",
        "required": false,
        "description": "HTML attributes (for example data attributes) to add to the fieldset container."
    },
    {
        "name": "caller",
        "type": "nunjucks-block",
        "required": false,
        "description": "Not strictly a parameter but [Nunjucks code convention](https://mozilla.github.io/nunjucks/templating.html#call). Using a `call` block enables you to call a macro with all the text inside the tag. This is helpful if you want to pass a lot of content into a macro. To use it, you will need to wrap the entire fielset component in a `call` block. See [checkboxes component](https://github.com/alphagov/govuk-frontend/blob/master/src/components/checkboxes/template.njk#L86) for an example."
    }
]