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  1. [ References  ](/en-US/docs/Web)
  2. [ Web APIs  ](/en-US/docs/Web/API)
  3. [ Headers  ](/en-US/docs/Web/API/Headers)

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##  In this article

  * Constructor 
  * Instance methods 
  * Examples 
  * Specifications 
  * Browser compatibility 
  * See also 

  1. **[ Fetch API ](/en-US/docs/Web/API/Fetch_API) **
  2. **_[ ` Headers ` ](/en-US/docs/Web/API/Headers) _ **
  3. Constructor 
    1. [ ` Headers() ` ](/en-US/docs/Web/API/Headers/Headers)
  4. Instance methods 
    1. [ ` append() ` ](/en-US/docs/Web/API/Headers/append)
    2. [ ` delete() ` ](/en-US/docs/Web/API/Headers/delete)
    3. [ ` entries() ` ](/en-US/docs/Web/API/Headers/entries)
    4. [ ` forEach() ` ](/en-US/docs/Web/API/Headers/forEach)
    5. [ ` get() ` ](/en-US/docs/Web/API/Headers/get)
    6. [ ` getSetCookie() ` ](/en-US/docs/Web/API/Headers/getSetCookie)
    7. [ ` has() ` ](/en-US/docs/Web/API/Headers/has)
    8. [ ` keys() ` ](/en-US/docs/Web/API/Headers/keys)
    9. [ ` set() ` ](/en-US/docs/Web/API/Headers/set)
    10. [ ` values() ` ](/en-US/docs/Web/API/Headers/values)
  5. Related pages for Fetch API 
    1. [ ` Request ` ](/en-US/docs/Web/API/Request)
    2. [ ` Response ` ](/en-US/docs/Web/API/Response)
    3. [ ` fetch() ` ](/en-US/docs/Web/API/fetch)

##  In this article

  * Constructor 
  * Instance methods 
  * Examples 
  * Specifications 
  * Browser compatibility 
  * See also 

#  Headers

**Note:** This feature is available in [ Web Workers ](/en-
US/docs/Web/API/Web_Workers_API) .

The **` Headers ` ** interface of the [ Fetch API ](/en-
US/docs/Web/API/Fetch_API) allows you to perform various actions on [ HTTP
request and response headers ](/en-US/docs/Web/HTTP/Headers) . These actions
include retr