{"json_modified": "2016-04-14T11:03:02.634310", "uuid": "f712f225-22df-4bf7-9fb1-8ade666c9f16", "title": "PasswordCredential.additionalData", "url": "/en-US/docs/Web/API/PasswordCredential/additionalData", "tags": ["additionalData", "credential management", "Reference", "API", "credentials", "PasswordCredential"], "translations": [], "modified": "2016-04-14T11:03:03", "label": "PasswordCredential.additionalData", "localization_tags": [], "locale": "en-US", "id": 180904, "last_edit": "2016-04-14T11:03:00", "summary": "The <strong><code>additionalData</code></strong> property of the <a href=\"/en-US/docs/Web/API/PasswordCredential\" title=\"The interface of the the Credential Management API provides information about a username/password pair.\"><code>PasswordCredential</code></a> interface takes one of a <a href=\"/en-US/docs/Web/API/FormData\" title=\"The FormData interface provides a way to easily construct a set of key/value pairs representing form fields and their values, which can then be easily sent using the XMLHttpRequest.send() method. It uses the same format a form would use if the encoding type were set to &quot;multipart/form-data&quot;.\"><code>FormData</code></a> instance,\u00a0a <a href=\"/en-US/docs/Web/API/URLSearchParams\" title=\"The URLSearchParams interface defines utility methods to work with the query string of a URL.\"><code>URLSearchParams</code></a> instance, or null. The data in the objects will be added to the\u00a0request\u00a0body and sent to the remote endpoint with the credentials.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Value", "title": "Value"}, {"id": "Example", "title": "Example"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}], "slug": "Web/API/PasswordCredential/additionalData", "review_tags": ["technical", "editorial"]}