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1<!doctype html><html lang=en dir=ltr class="docs-wrapper plugin-docs plugin-id-default docs-version-0.79 docs-doc-page docs-doc-id-network" data-has-hydrated=false><meta charset=UTF-8><meta name=generator content="Docusaurus v3.8.0"><title data-rh=true>Networking · React Native</title><meta data-rh=true name=viewport content="width=device-width, initial-scale=1.0"><meta data-rh=true property=og:url content=https://reactnative.dev/docs/network><meta data-rh=true property=og:locale content=en><meta data-rh=true name=docusaurus_locale content=en><meta data-rh=true name=docsearch:language content=en><meta data-rh=true property=og:image content=https://reactnative.dev/img/logo-share.png><meta data-rh=true name=twitter:card content=summary_large_image><meta data-rh=true name=twitter:image content=https://reactnative.dev/img/logo-share.png><meta data-rh=true name=twitter:site content=@reactnative><meta data-rh=true name=docusaurus_version content=0.79><meta data-rh=true name=docusaurus_tag content=docs-default-0.79><meta data-rh=true name=docsearch:version content=0.79><meta data-rh=true name=docsearch:docusaurus_tag content=docs-default-0.79><meta data-rh=true property=og:title content="Networking · React Native"><meta data-rh=true name=description content="Many mobile apps need to load resources from a remote URL. You may want to make a POST request to a REST API, or you may need to fetch a chunk of static content from another server."><meta data-rh=true property=og:description content="Many mobile apps need to load resources from a remote URL. 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You may want to make a POST request to a REST API, or you may need to fetch a chunk of static content from another server.</p> 5<h2 class="anchor anchorWithStickyNavbar_JmGV" id=using-fetch>Using Fetch<a href=#using-fetch class=hash-link aria-label="Direct link to Using Fetch" title="Direct link to Using Fetch">​</a></h2> 6<p>React Native provides the <a href=https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API target=_blank rel="noopener noreferrer">Fetch API</a> for your networking needs. Fetch will seem familiar if you have used <code>XMLHttpRequest</code> or other networking APIs before. You may refer to MDN's guide on <a href=https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch target=_blank rel="noopener noreferrer">Using Fetch</a> for additional information.</p> 7<h3 class="anchor anchorWithStickyNavbar_JmGV" id=making-requests>Making requests<a href=#making-requests class=hash-link aria-label="Direct link to Making requests" title="Direct link to Making requests">​</a></h3> 8<p>In order to fetch content from an arbitrary URL, you can pass the URL to fetch:</p> 9<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token function" style=color:#79b6f2>fetch</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'https://mywebsite.com/mydata.json'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 10<p>Fetch also takes an optional second argument that allows you to customize the HTTP request. You may want to specify additional headers, or make a POST request:</p> 11<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token function" style=color:#79b6f2>fetch</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'https://mywebsite.com/endpoint/'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> method</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'POST'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> headers</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token maybe-class-name">Accept</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'application/json'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token string-property property" style=color:#2aa198>'Content-Type'</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'application/json'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> body</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token known-class-name class-name" style=color:#fac863>JSON</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>stringify</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> firstParam</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'yourValue'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> secondParam</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'yourOtherValue'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 12<p>Take a look at the <a href=https://developer.mozilla.org/en-US/docs/Web/API/Request target=_blank rel="noopener noreferrer">Fetch Request docs</a> for a full list of properties.</p> 13<h3 class="anchor anchorWithStickyNavbar_JmGV" id=handling-the-response>Handling the response<a href=#handling-the-response class=hash-link aria-label="Direct link to Handling the response" title="Direct link to Handling the response">​</a></h3> 14<p>The above examples show how you can make a request. In many cases, you will want to do something with the response.</p> 15<p>Networking is an inherently asynchronous operation. Fetch method will return a <a href=https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise target=_blank rel="noopener noreferrer">Promise</a> that makes it straightforward to write code that works in an asynchronous manner:</p> 16<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> </span><span class="token function-variable function" style=color:#79b6f2>getMoviesFromApi</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>fetch</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'https://reactnative.dev/movies.json'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>then</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">response </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> response</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>json</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>then</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">json </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> json</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">movies</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>catch</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">error </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token console class-name" style=color:#fac863>console</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>error</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">error</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 17<p>You can also use the <code>async</code> / <code>await</code> syntax in a React Native app:</p> 18<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> </span><span class="token function-variable function" style=color:#79b6f2>getMoviesFromApiAsync</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>async</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>try</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> response </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>await</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>fetch</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token string" style=color:#8dc891>'https://reactnative.dev/movies.json'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> json </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>await</span><span class="token plain"> response</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>json</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> json</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">movies</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>catch</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">error</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token console class-name" style=color:#fac863>console</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>error</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">error</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 19<p>Don't forget to catch any errors that may be thrown by <code>fetch</code>, otherwise they will be dropped silently.</p> 20<div class="tabs-container tabList_J5MA"><ul role=tablist aria-orientation=horizontal class=tabs><li role=tab tabindex=0 aria-selected=true class="tabs__item tabItem_l0OV tabs__item--active">TypeScript<li role=tab tabindex=-1 aria-selected=false class="tabs__item tabItem_l0OV">JavaScript</ul><div class=margin-top--md><div role=tabpanel class=tabItem_wHwb hidden><div class=snack-player data-snack-name="Fetch Example" data-snack-description="Example usage" data-snack-files="%7B%22App.js%22%3A%7B%22type%22%3A%22CODE%22%2C%22contents%22%3A%22import%20React%2C%20%7BuseEffect%2C%20useState%7D%20from%20'react'%3B%5Cnimport%20%7BActivityIndicator%2C%20FlatList%2C%20Text%2C%20View%7D%20from%20'react-native'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20%7B%5Cn%20%20const%20%5BisLoading%2C%20setLoading%5D%20%3D%20useState(true)%3B%5Cn%20%20const%20%5Bdata%2C%20setData%5D%20%3D%20useState(%5B%5D)%3B%5Cn%5Cn%20%20const%20getMovies%20%3D%20async%20()%20%3D%3E%20%7B%5Cn%20%20%20%20try%20%7B%5Cn%20%20%20%20%20%20const%20response%20%3D%20await%20fetch('https%3A%2F%2Freactnative.dev%2Fmovies.json')%3B%5Cn%20%20%20%20%20%20const%20json%20%3D%20await%20response.json()%3B%5Cn%20%20%20%20%20%20setData(json.movies)%3B%5Cn%20%20%20%20%7D%20catch%20(error)%20%7B%5Cn%20%20%20%20%20%20console.error(error)%3B%5Cn%20%20%20%20%7D%20finally%20%7B%5Cn%20%20%20%20%20%20setLoading(false)%3B%5Cn%20%20%20%20%7D%5Cn%20%20%7D%3B%5Cn%5Cn%20%20useEffect(()%20%3D%3E%20%7B%5Cn%20%20%20%20getMovies()%3B%5Cn%20%20%7D%2C%20%5B%5D)%3B%5Cn%5Cn%20%20return%20(%5Cn%20%20%20%20%3CView%20style%3D%7B%7Bflex%3A%201%2C%20padding%3A%2024%7D%7D%3E%5Cn%20%20%20%20%20%20%7BisLoading%20%3F%20(%5Cn%20%20%20%20%20%20%20%20%3CActivityIndicator%20%2F%3E%5Cn%20%20%20%20%20%20)%20%3A%20(%5Cn%20%20%20%20%20%20%20%20%3CFlatList%5Cn%20%20%20%20%20%20%20%20%20%20data%3D%7Bdata%7D%5Cn%20%20%20%20%20%20%20%20%20%20keyExtractor%3D%7B(%7Bid%7D)%20%3D%3E%20id%7D%5Cn%20%20%20%20%20%20%20%20%20%20renderItem%3D%7B(%7Bitem%7D)%20%3D%3E%20(%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%3CText%3E%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7Bitem.title%7D%2C%20%7Bitem.releaseYear%7D%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20%20%20)%7D%5Cn%20%20%20%20%20%20%20%20%2F%3E%5Cn%20%20%20%20%20%20)%7D%5Cn%20%20%20%20%3C%2FView%3E%5Cn%20%20)%3B%5Cn%7D%3B%5Cn%5Cnexport%20default%20App%3B%22%7D%7D" data-snack-dependencies=react-native-safe-area-context data-snack-platform=web data-snack-supported-platforms=ios,android,web data-snack-theme=light data-snack-preview=true data-snack-loading=lazy data-snack-device-frame=false></div></div><div role=tabpanel class=tabItem_wHwb><div class=snack-player data-snack-name="Fetch Example" data-snack-description="Example usage" data-snack-files="%7B%22App.tsx%22%3A%7B%22type%22%3A%22CODE%22%2C%22contents%22%3A%22import%20React%2C%20%7BuseEffect%2C%20useState%7D%20from%20'react'%3B%5Cnimport%20%7BActivityIndicator%2C%20FlatList%2C%20Text%2C%20View%7D%20from%20'react-native'%3B%5Cn%5Cntype%20Movie%20%3D%20%7B%5Cn%20%20id%3A%20string%3B%5Cn%20%20title%3A%20string%3B%5Cn%20%20releaseYear%3A%20string%3B%5Cn%7D%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20%7B%5Cn%20%20const%20%5BisLoading%2C%20setLoading%5D%20%3D%20useState(true)%3B%5Cn%20%20const%20%5Bdata%2C%20setData%5D%20%3D%20useState%3CMovie%5B%5D%3E(%5B%5D)%3B%5Cn%5Cn%20%20const%20getMovies%20%3D%20async%20()%20%3D%3E%20%7B%5Cn%20%20%20%20try%20%7B%5Cn%20%20%20%20%20%20const%20response%20%3D%20await%20fetch('https%3A%2F%2Freactnative.dev%2Fmovies.json')%3B%5Cn%20%20%20%20%20%20const%20json%20%3D%20await%20response.json()%3B%5Cn%20%20%20%20%20%20setData(json.movies)%3B%5Cn%20%20%20%20%7D%20catch%20(error)%20%7B%5Cn%20%20%20%20%20%20console.error(error)%3B%5Cn%20%20%20%20%7D%20finally%20%7B%5Cn%20%20%20%20%20%20setLoading(false)%3B%5Cn%20%20%20%20%7D%5Cn%20%20%7D%3B%5Cn%5Cn%20%20useEffect(()%20%3D%3E%20%7B%5Cn%20%20%20%20getMovies()%3B%5Cn%20%20%7D%2C%20%5B%5D)%3B%5Cn%5Cn%20%20return%20(%5Cn%20%20%20%20%3CView%20style%3D%7B%7Bflex%3A%201%2C%20padding%3A%2024%7D%7D%3E%5Cn%20%20%20%20%20%20%7BisLoading%20%3F%20(%5Cn%20%20%20%20%20%20%20%20%3CActivityIndicator%20%2F%3E%5Cn%20%20%20%20%20%20)%20%3A%20(%5Cn%20%20%20%20%20%20%20%20%3CFlatList%5Cn%20%20%20%20%20%20%20%20%20%20data%3D%7Bdata%7D%5Cn%20%20%20%20%20%20%20%20%20%20keyExtractor%3D%7B(%7Bid%7D)%20%3D%3E%20id%7D%5Cn%20%20%20%20%20%20%20%20%20%20renderItem%3D%7B(%7Bitem%7D)%20%3D%3E%20(%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%3CText%3E%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7Bitem.title%7D%2C%20%7Bitem.releaseYear%7D%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20%20%20)%7D%5Cn%20%20%20%20%20%20%20%20%2F%3E%5Cn%20%20%20%20%20%20)%7D%5Cn%20%20%20%20%3C%2FView%3E%5Cn%20%20)%3B%5Cn%7D%3B%5Cn%5Cnexport%20default%20App%3B%22%7D%7D" data-snack-dependencies=react-native-safe-area-context data-snack-platform=web data-snack-supported-platforms=ios,android,web data-snack-theme=light data-snack-preview=true data-snack-loading=lazy data-snack-device-frame=false></div></div></div></div> 21<blockquote> 22<p>By default, iOS 9.0 or later enforce App Transport Security (ATS). ATS requires any HTTP connection to use HTTPS. If you need to fetch from a cleartext URL (one that begins with <code>http</code>) you will first need to <a href=/docs/integration-with-existing-apps#test-your-integration>add an ATS exception</a>. If you know ahead of time what domains you will need access to, it is more secure to add exceptions only for those domains; if the domains are not known until runtime you can <a href=/docs/publishing-to-app-store#1-enable-app-transport-security>disable ATS completely</a>. Note however that from January 2017, <a href=https://forums.developer.apple.com/thread/48979 target=_blank rel="noopener noreferrer">Apple's App Store review will require reasonable justification for disabling ATS</a>. See <a href=https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html#//apple_ref/doc/uid/TP40009251-SW33 target=_blank rel="noopener noreferrer">Apple's documentation</a> for more information.</p> 23</blockquote> 24<blockquote> 25<p>On Android, as of API Level 28, clear text traffic is also blocked by default. This behaviour can be overridden by setting <a href=https://developer.android.com/guide/topics/manifest/application-element#usesCleartextTraffic target=_blank rel="noopener noreferrer"><code>android:usesCleartextTraffic</code></a> in the app manifest file.</p> 26</blockquote> 27<h2 class="anchor anchorWithStickyNavbar_JmGV" id=using-other-networking-libraries>Using Other Networking Libraries<a href=#using-other-networking-libraries class=hash-link aria-label="Direct link to Using Other Networking Libraries" title="Direct link to Using Other Networking Libraries">​</a></h2> 28<p>The <a href=https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest target=_blank rel="noopener noreferrer">XMLHttpRequest API</a> is built into React Native. This means that you can use third party libraries such as <a href=https://github.com/niftylettuce/frisbee target=_blank rel="noopener noreferrer">frisbee</a> or <a href=https://github.com/axios/axios target=_blank rel="noopener noreferrer">axios</a> that depend on it, or you can use the XMLHttpRequest API directly if you prefer.</p> 29<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> request </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>XMLHttpRequest</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">request</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method-variable function-variable method function property-access" style=color:#79b6f2>onreadystatechange</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> e </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">request</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">readyState</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>!==</span><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>4</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">request</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">status</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>===</span><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>200</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token console class-name" style=color:#fac863>console</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>log</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'success'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> request</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">responseText</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>else</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token console class-name" style=color:#fac863>console</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>warn</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'error'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">request</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>open</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'GET'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'https://mywebsite.com/endpoint/'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">request</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>send</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 30<blockquote> 31<p>The security model for XMLHttpRequest is different than on web as there is no concept of <a href=https://en.wikipedia.org/wiki/Cross-origin_resource_sharing target=_blank rel="noopener noreferrer">CORS</a> in native apps.</p> 32</blockquote> 33<h2 class="anchor anchorWithStickyNavbar_JmGV" id=websocket-support>WebSocket Support<a href=#websocket-support class=hash-link aria-label="Direct link to WebSocket Support" title="Direct link to WebSocket Support">​</a></h2> 34<p>React Native also supports <a href=https://developer.mozilla.org/en-US/docs/Web/API/WebSocket target=_blank rel="noopener noreferrer">WebSockets</a>, a protocol which provides full-duplex communication channels over a single TCP connection.</p> 35<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> ws </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>WebSocket</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'ws://host.com/path'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">ws</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method-variable function-variable method function property-access" style=color:#79b6f2>onopen</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// connection opened</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> ws</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>send</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'something'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// send a message</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">ws</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method-variable function-variable method function property-access" style=color:#79b6f2>onmessage</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> e </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// a message was received</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token console class-name" style=color:#fac863>console</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>log</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">e</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">data</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">ws</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method-variable function-variable method function property-access" style=color:#79b6f2>onerror</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> e </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// an error occurred</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token console class-name" style=color:#fac863>console</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>log</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">e</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">message</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">ws</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method-variable function-variable method function property-access" style=color:#79b6f2>onclose</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> e </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// connection closed</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token console class-name" style=color:#fac863>console</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>log</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">e</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">code</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> e</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">reason</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 36<h2 class="anchor anchorWithStickyNavbar_JmGV" id=known-issues-with-fetch-and-cookie-based-authentication>Known Issues with <code>fetch</code> and cookie based authentication<a href=#known-issues-with-fetch-and-cookie-based-authentication class=hash-link aria-label="Direct link to known-issues-with-fetch-and-cookie-based-authentication" title="Direct link to known-issues-with-fetch-and-cookie-based-authentication">​</a></h2> 37<p>The following options are currently not working with <code>fetch</code></p> 38<ul> 39<li><code>redirect:manual</code></li> 40<li><code>credentials:omit</code></li> 41</ul> 42<ul> 43<li>Having same name headers on Android will result in only the latest one being present. A temporary solution can be found here: <a href=https://github.com/facebook/react-native/issues/18837#issuecomment-398779994 target=_blank rel="noopener noreferrer">https://github.com/facebook/react-native/issues/18837#issuecomment-398779994</a>.</li> 44<li>Cookie based authentication is currently unstable. You can view some of the issues raised here: <a href=https://github.com/facebook/react-native/issues/23185 target=_blank rel="noopener noreferrer">https://github.com/facebook/react-native/issues/23185</a></li> 45<li>As a minimum on iOS, when redirected through a <code>302</code>, if a <code>Set-Cookie</code> header is present, the cookie is not set properly. Since the redirect cannot be handled manually this might cause a scenario where infinite requests occur if the redirect is the result of an expired session.</li> 46</ul> 47<h2 class="anchor anchorWithStickyNavbar_JmGV" id=configuring-nsurlsession-on-ios>Configuring NSURLSession on iOS<a href=#configuring-nsurlsession-on-ios class=hash-link aria-label="Direct link to Configuring NSURLSession on iOS" title="Direct link to Configuring NSURLSession on iOS">​</a></h2> 48<p>For some applications it may be appropriate to provide a custom <code>NSURLSessionConfiguration</code> for the underlying <code>NSURLSession</code> that is used for network requests in a React Native application running on iOS. For instance, one may need to set a custom user agent string for all network requests coming from the app or supply <code>NSURLSession</code> with an ephemeral <code>NSURLSessionConfiguration</code>. The function <code>RCTSetCustomNSURLSessionConfigurationProvider</code> allows for such customization. Remember to add the following import to the file in which <code>RCTSetCustomNSURLSessionConfigurationProvider</code> will be called:</p> 49<div class="language-objectivec codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>objectivec</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-objectivec codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token macro property directive-hash" style=color:#2aa198>#</span><span class="token macro property directive keyword" style=color:#c5a5c5>import</span><span class="token macro property" style=color:#2aa198> </span><span class="token macro property expression operator" style=color:#fc929e>&lt;</span><span class="token macro property expression" style=color:#2aa198>React</span><span class="token macro property expression operator" style=color:#fc929e>/</span><span class="token macro property expression" style=color:#2aa198>RCTHTTPRequestHandler</span><span class="token macro property expression punctuation" style=color:#657b83>.</span><span class="token macro property expression" style=color:#2aa198>h</span><span class="token macro property expression operator" style=color:#fc929e>></span><br></span></code></pre></div></div> 50<p><code>RCTSetCustomNSURLSessionConfigurationProvider</code> should be called early in the application life cycle such that it is readily available when needed by React, for instance:</p> 51<div class="language-objectivec codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>objectivec</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-objectivec codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token operator" style=color:#fc929e>-</span><span class="token punctuation" style=color:#657b83>(</span><span class="token keyword" style=color:#c5a5c5>void</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain">application</span><span class="token punctuation" style=color:#657b83>:</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">__unused UIApplication </span><span class="token operator" style=color:#fc929e>*</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain">application didFinishLaunchingWithOptions</span><span class="token punctuation" style=color:#657b83>:</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">NSDictionary </span><span class="token operator" style=color:#fc929e>*</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain">launchOptions </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// set RCTSetCustomNSURLSessionConfigurationProvider</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token function" style=color:#79b6f2>RCTSetCustomNSURLSessionConfigurationProvider</span><span class="token punctuation" style=color:#657b83>(</span><span class="token operator" style=color:#fc929e>^</span><span class="token plain">NSURLSessionConfiguration </span><span class="token operator" style=color:#fc929e>*</span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> NSURLSessionConfiguration </span><span class="token operator" style=color:#fc929e>*</span><span class="token plain">configuration </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>[</span><span class="token plain">NSURLSessionConfiguration defaultSessionConfiguration</span><span class="token punctuation" style=color:#657b83>]</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// configure the session</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> configuration</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// set up React</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> _bridge </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>[</span><span class="token punctuation" style=color:#657b83>[</span><span class="token plain">RCTBridge alloc</span><span class="token punctuation" style=color:#657b83>]</span><span class="token plain"> initWithDelegate</span><span class="token punctuation" style=color:#657b83>:</span><span class="token keyword" style=color:#c5a5c5>self</span><span class="token plain"> launchOptions</span><span class="token punctuation" style=color:#657b83>:</span><span class="token plain">launchOptions</span><span class="token punctuation" style=color:#657b83>]</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><br></span></code></pre></div></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class=editButtons_t0bR><a 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