Jquery Ajax uses Token to verify identity

Because I have done several backends recently, Token verification identity operations are often involved in the backend, so here is a record of how to transfer the request header and Token to the backend.

success:function(dat){
                    console.log(dat);                        
                    if(dat.code==1){
                            sessionStorage.setItem('token',dat.data.access_token);                            //这里设置缓存存储Token
                            sessionStorage.setItem('user',userName);
                            location.href = "index.html";
                        }else{
                            $(".tip2").html("用户名或密码错误");
                        }
                }

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