XMLHttpRequest.withCredentials - Web APIs 编辑

The XMLHttpRequest.withCredentials property is a Boolean that indicates whether or not cross-site Access-Control requests should be made using credentials such as cookies, authorization headers or TLS client certificates. Setting withCredentials has no effect on same-site requests.

In addition, this flag is also used to indicate when cookies are to be ignored in the response. The default is false. XMLHttpRequest from a different domain cannot set cookie values for their own domain unless withCredentials is set to true before making the request. The third-party cookies obtained by setting withCredentials to true will still honor same-origin policy and hence can not be accessed by the requesting script through document.cookie or from response headers.

Note: This never affects same-site requests.

Note: XMLHttpRequest responses from a different domain cannot set cookie values for their own domain unless withCredentials is set to true before making the request, regardless of Access-Control- header values. 

Example

var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://example.com/', true);
xhr.withCredentials = true;
xhr.send(null);

Specifications

Browser compatibility

BCD tables only load in the browser