JavaScript parameters

Use the following table of JavaScript parameters to populate the fields in your function.

Parameters
`partnerId`	`string`, Required Your partner code. This should should have been given to you when you contacted Google Domains in Step 1.
`successUrl`	`string`, Required The URL that you would like users to be returned to once they purchased their domain. This URL may contain any fields you pass into the function. This URL may append the name of the domain that was purchased, which will be a reserved variable provided by Google Domains as `%domain%`. Please note: this URL must use https protocol. Sample URL: `"www.example.com/success?uid="+userId+"&domain=%domain%"`
`cancelUrl`	`string`, Required The URL that you would like users to be returned to if there were any errors or cancellations during the purchase process. Users that fail to purchase a domain for any reason will be redirected to this URL. This field follows the same format as the `successURL` field. Please note: this URL must use https protocol.
`defaultQuery`	`string`, Optional This field contains the default search query when the user is redirected to the Google Domains Express Checkout page.
`defaultTlds`	`string array`, Optional This is an array of top-level domains that will be set as the default filter options in search results. Example: `["com", "cc", "florist", "ninja"]`
`template`	`field`, Conditionally required This optional field contains information on which template you want to associate with the user. This field can be omitted if you do not have a template.
`templateId`	`string`, Conditionally required The name of the template you want to use for this page. This should have been created during the setup of your template in Step 1. This field is required if you decide to use a template.
`vars`	`string`, Conditionally required Any fields you wish to use in the template. These should be passed in key:value format, such as "blog_id" : "3". These fields should have been specified during the setup process in Step 1. Note that the Express Checkout redirect will fail if the parameters passed in are different from those specified during setup. The variable `%domain%` is reserved and is automatically populated with the domain name purchased by the user, so you can use it in your resource records if necessary.