/fetch_api/
Body接口：Request方法

  1. Fetch API官方文档指南
    1. Fetch API基本概念
    2. 使用Fetch
  2. Fetch API接口
    1. Fetch API：Body接口
      1. Body接口属性
        1. Body接口方法
        2. Body接口执行者
          1. Body执行者：Request
            1. Body接口：Request方法
              1. Body执行者：Response
                1. Body接口：Response方法
                2. Fetch API：Headers接口
                  1. Headers接口：Headers()构造函数
                    1. Headers接口的方法
                  2. Fetch API方法
                    1. Fetch API方法：WindowOrWorkerGlobalScope属性
                      1. WindowOrWorkerGlobalScope接口属性：caches
                        1. WindowOrWorkerGlobalScope接口属性：indexedDB
                          1. WindowOrWorkerGlobalScope接口属性：isSecureContext
                            1. WindowOrWorkerGlobalScope接口属性：origin
                            2. WindowOrWorkerGlobalScope接口方法
                              1. WindowOrWorkerGlobalScope接口方法：atob()
                                1. WindowOrWorkerGlobalScope接口方法：btoa()
                                  1. WindowOrWorkerGlobalScope接口方法：clearInterval()
                                    1. WindowOrWorkerGlobalScope接口方法：clearTimeout()
                                      1. WindowOrWorkerGlobalScope接口方法：createImageBitmap()
                                        1. WindowOrWorkerGlobalScope接口方法：fetch()
                                          1. WindowOrWorkerGlobalScope接口方法：setInterval()
                                            1. WindowOrWorkerGlobalScope接口方法：setTimeout()
                                            2. WindowOrWorkerGlobalScope执行者：window
                                              1. window属性
                                                1. window方法
                                              2. WindowOrWorkerGlobalScope执行者：WorkerGlobalScope
                                              3. WorkerGlobalScope属性
                                                1. WorkerGlobalScope属性：console
                                                2. WorkerGlobalScope属性：location
                                                3. WorkerGlobalScope属性：navigator
                                                4. WorkerGlobalScope属性：onerror
                                                5. WorkerGlobalScope属性：onlanguagechange
                                                6. WorkerGlobalScope属性：onoffline
                                                7. WorkerGlobalScope属性：ononline
                                                8. WorkerGlobalScope属性：performance
                                                9. WorkerGlobalScope属性：self
                                              4. WorkerGlobalScope方法
                                                1. WorkerGlobalScope方法：close()
                                                2. WorkerGlobalScope方法：dump()
                                                3. WorkerGlobalScope方法：importScripts()
                                              5. WorkerGlobalScope继承
                                                1. WorkerGlobalScope继承：EventTarget
                                                  1. EventTarget构造函数
                                                  2. EventTarget方法
                                                    1. EventTarget方法：addEventListener()
                                                      1. EventTarget方法：dispatchEvent()
                                                      2. EventTarget事件
                                                        1. EventTarget事件：abort
                                                          1. EventTarget事件：beforeinput
                                                            1. EventTarget事件：blur
                                                              1. EventTarget事件：click
                                                                1. EventTarget事件：compositionstart
                                                                  1. EventTarget事件：compositionupdate
                                                                    1. EventTarget事件：dblclick
                                                                      1. EventTarget事件：error
                                                                        1. EventTarget事件：focus
                                                                          1. EventTarget事件：focusin
                                                                            1. EventTarget事件：focusout
                                                                              1. EventTarget事件：input
                                                                                1. EventTarget事件：keydown
                                                                                  1. EventTarget事件：keypress
                                                                                    1. EventTarget事件：keyup
                                                                                      1. EventTarget事件：load
                                                                                        1. EventTarget事件：mousedown
                                                                                          1. EventTarget事件：mouseenter
                                                                                            1. EventTarget事件：mouseleave
                                                                                              1. EventTarget事件：mousemove
                                                                                                1. EventTarget事件：mouseout
                                                                                                  1. EventTarget事件：mouseover
                                                                                                    1. EventTarget事件：mouseup
                                                                                                      1. EventTarget事件：resize
                                                                                                        1. EventTarget事件：scroll
                                                                                                          1. EventTarget事件：select
                                                                                                            1. EventTarget事件：unload