(window.webpackJsonp=window.webpackJsonp||[]).push([[1741],{2149:function(t,s,a){"use strict";a.r(s);var n=a(31),e=Object(n.a)({},(function(){var t=this,s=t.$createElement,a=t._self._c||s;return a("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[a("h1",{attrs:{id:"fetch"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#fetch"}},[t._v("#")]),t._v(" Fetch")]),t._v(" "),a("h2",{attrs:{id:"getting-json-data"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#getting-json-data"}},[t._v("#")]),t._v(" Getting JSON data")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// get some data from stackoverflow")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"https://api.stackexchange.com/2.2/questions/featured?order=desc&sort=activity&site=stackoverflow"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("then")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("resp")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" resp"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("json")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("then")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("json")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" console"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("log")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("json"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("catch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("err")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" console"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("log")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("err"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("h2",{attrs:{id:"set-request-headers"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#set-request-headers"}},[t._v("#")]),t._v(" Set Request Headers")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'/example.json'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n headers"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("new")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("Headers")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'Accept'")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'text/plain'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'X-Your-Custom-Header'")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'example value'")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("h2",{attrs:{id:"post-data"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#post-data"}},[t._v("#")]),t._v(" POST Data")]),t._v(" "),a("p",[t._v("Posting form data")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token template-string"}},[a("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[t._v("`")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("/example/submit")]),a("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[t._v("`")])]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n method"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'POST'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n body"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("new")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("FormData")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("getElementById")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'example-form'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[t._v("Posting JSON data")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token template-string"}},[a("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[t._v("`")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("/example/submit.json")]),a("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[t._v("`")])]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n method"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'POST'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n body"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token constant"}},[t._v("JSON")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("stringify")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n email"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("getElementById")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'example-email'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("value"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n comment"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("getElementById")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'example-comment'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("value\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("h2",{attrs:{id:"globalfetch"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#globalfetch"}},[t._v("#")]),t._v(" GlobalFetch")]),t._v(" "),a("p",[t._v("The "),a("a",{attrs:{href:"https://fetch.spec.whatwg.org/#globalfetch",target:"_blank",rel:"noopener noreferrer"}},[t._v("GlobalFetch"),a("OutboundLink")],1),t._v(" interface exposes the "),a("code",[t._v("fetch")]),t._v(" function, which can be used to request resources.")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'/path/to/resource.json'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("then")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("response")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("if")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("!")]),t._v("response"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("ok")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("throw")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("new")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("Error")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Request failed!"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n \n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("return")]),t._v(" response"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("json")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("then")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("json")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v(" \n console"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("log")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("json"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" \n\n")])])]),a("p",[t._v("The resolved value is a "),a("a",{attrs:{href:"https://fetch.spec.whatwg.org/#response-class",target:"_blank",rel:"noopener noreferrer"}},[t._v("Response"),a("OutboundLink")],1),t._v(" Object. This Object contains the body of the response, as well as it's status and headers.")]),t._v(" "),a("h2",{attrs:{id:"send-cookies"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#send-cookies"}},[t._v("#")]),t._v(" Send cookies")]),t._v(" "),a("p",[t._v("The fetch function does not send cookies by default. There are two possible ways to send cookies:")]),t._v(" "),a("ol",[a("li",[t._v("Only send cookies if the URL is on the same origin as the calling script.")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'/login'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n credentials"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'same-origin'")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n\n")])])]),a("ol",[a("li",[t._v("Always send cookies, even for cross-origin calls.")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'https://otherdomain.com/login'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n credentials"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'include'")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n\n")])])]),a("h2",{attrs:{id:"using-fetch-to-display-questions-from-the-stack-overflow-api"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#using-fetch-to-display-questions-from-the-stack-overflow-api"}},[t._v("#")]),t._v(" Using Fetch to Display Questions from the Stack Overflow API")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("const")]),t._v(" url "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'http://api.stackexchange.com/2.2/questions?site=stackoverflow&tagged=javascript'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("const")]),t._v(" questionList "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createElement")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'ul'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\ndocument"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("body"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("questionList"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("const")]),t._v(" responseData "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fetch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("url"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("then")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("response")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" response"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("json")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\nresponseData"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("then")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("items"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" has_more"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" quota_max"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" quota_remaining"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")])]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("for")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("const")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("title"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" score"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" owner"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" link"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" answer_count"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("of")]),t._v(" items"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("const")]),t._v(" listItem "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createElement")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'li'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n questionList"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("listItem"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("const")]),t._v(" a "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createElement")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'a'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n listItem"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("a"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n a"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("href "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" link"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n a"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("textContent "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token template-string"}},[a("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[t._v("`")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("[")]),a("span",{pre:!0,attrs:{class:"token interpolation"}},[a("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[t._v("${")]),t._v("score"),a("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[t._v("}")])]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("] ")]),a("span",{pre:!0,attrs:{class:"token interpolation"}},[a("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[t._v("${")]),t._v("title"),a("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[t._v("}")])]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v(" (by ")]),a("span",{pre:!0,attrs:{class:"token interpolation"}},[a("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[t._v("${")]),t._v("owner"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("display_name "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("||")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'somebody'")]),a("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[t._v("}")])]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[t._v("`")])]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("h4",{attrs:{id:"syntax"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#syntax"}},[t._v("#")]),t._v(" Syntax")]),t._v(" "),a("ul",[a("li",[t._v("promise = fetch(url).then(function(response) {})")]),t._v(" "),a("li",[t._v("promise = fetch(url, options)")]),t._v(" "),a("li",[t._v("promise = fetch(request)")])]),t._v(" "),a("h4",{attrs:{id:"parameters"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#parameters"}},[t._v("#")]),t._v(" Parameters")]),t._v(" "),a("table",[a("thead",[a("tr",[a("th",[t._v("Options")]),t._v(" "),a("th",[t._v("Details")])])]),t._v(" "),a("tbody",[a("tr",[a("td",[a("code",[t._v("method")])]),t._v(" "),a("td",[t._v("The HTTP method to use for the request. ex: "),a("code",[t._v("GET")]),t._v(", "),a("code",[t._v("POST")]),t._v(", "),a("code",[t._v("PUT")]),t._v(", "),a("code",[t._v("DELETE")]),t._v(", "),a("code",[t._v("HEAD")]),t._v(". Defaults to "),a("code",[t._v("GET")]),t._v(".")])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("headers")])]),t._v(" "),a("td",[t._v("A "),a("code",[t._v("Headers")]),t._v(" object containing additional HTTP headers to include in the request.")])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("body")])]),t._v(" "),a("td",[t._v("The request payload, can be a "),a("code",[t._v("string")]),t._v(" or a "),a("code",[t._v("FormData")]),t._v(" object. Defaults to "),a("code",[t._v("undefined")])])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("cache")])]),t._v(" "),a("td",[t._v("The caching mode. "),a("code",[t._v("default")]),t._v(", "),a("code",[t._v("reload")]),t._v(", "),a("code",[t._v("no-cache")])])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("referrer")])]),t._v(" "),a("td",[t._v("The referrer of the request.")])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("mode")])]),t._v(" "),a("td",[a("code",[t._v("cors")]),t._v(", "),a("code",[t._v("no-cors")]),t._v(", "),a("code",[t._v("same-origin")]),t._v(". Defaults to "),a("code",[t._v("no-cors")]),t._v(".")])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("credentials")])]),t._v(" "),a("td",[a("code",[t._v("omit")]),t._v(", "),a("code",[t._v("same-origin")]),t._v(", "),a("code",[t._v("include")]),t._v(". Defaults to "),a("code",[t._v("omit")]),t._v(".")])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("redirect")])]),t._v(" "),a("td",[a("code",[t._v("follow")]),t._v(", "),a("code",[t._v("error")]),t._v(", "),a("code",[t._v("manual")]),t._v(". Defaults to "),a("code",[t._v("follow")]),t._v(".")])]),t._v(" "),a("tr",[a("td",[a("code",[t._v("integrity")])]),t._v(" "),a("td",[t._v("Associated integrity metadata. Defaults to empty string.")])])])]),t._v(" "),a("h4",{attrs:{id:"remarks"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#remarks"}},[t._v("#")]),t._v(" Remarks")]),t._v(" "),a("p",[a("a",{attrs:{href:"https://fetch.spec.whatwg.org",target:"_blank",rel:"noopener noreferrer"}},[t._v("The Fetch standard"),a("OutboundLink")],1),t._v(" defines requests, responses, and the process that binds them: fetching.")]),t._v(" "),a("p",[t._v("Among other interfaces, the standard defines "),a("code",[t._v("Request")]),t._v(" and "),a("code",[t._v("Response")]),t._v(" Objects, designed to be used for all operations involving network requests.")]),t._v(" "),a("p",[t._v("A useful application of these interfaces is "),a("code",[t._v("GlobalFetch")]),t._v(", which can be used to load remote resources.")]),t._v(" "),a("p",[t._v("For browsers that do not yet support the Fetch standard, GitHub has a "),a("a",{attrs:{href:"https://github.com/github/fetch",target:"_blank",rel:"noopener noreferrer"}},[t._v("polyfill"),a("OutboundLink")],1),t._v(" available. In addition, there is also a "),a("a",{attrs:{href:"https://github.com/bitinn/node-fetch",target:"_blank",rel:"noopener noreferrer"}},[t._v("Node.js implementation"),a("OutboundLink")],1),t._v(" that is useful for server/client consistency.")]),t._v(" "),a("p",[t._v("In the absence of cancelable Promises you can't abort the fetch request ("),a("a",{attrs:{href:"https://github.com/whatwg/fetch/issues/27",target:"_blank",rel:"noopener noreferrer"}},[t._v("github issue"),a("OutboundLink")],1),t._v("). But there is a "),a("a",{attrs:{href:"https://github.com/domenic/cancelable-promise",target:"_blank",rel:"noopener noreferrer"}},[t._v("proposal"),a("OutboundLink")],1),t._v(" by the T39 in stage 1 for cancelable promises.")])])}),[],!1,null,null,null);s.default=e.exports}}]);