mirror of
https://github.com/zhigang1992/create-react-app.git
synced 2026-06-11 07:43:55 +08:00
83 lines
18 KiB
HTML
83 lines
18 KiB
HTML
<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Fetching Data with AJAX Requests · Create React App</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="<p>React doesn't prescribe a specific approach to data fetching, but people commonly use either a library like <a href="https://github.com/axios/axios">axios</a> or the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API"><code>fetch()</code> API</a> provided by the browser.</p>
|
||
"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Fetching Data with AJAX Requests · Create React App"/><meta property="og:type" content="website"/><meta property="og:url" content="https://create-react-app.dev/index.html"/><meta property="og:description" content="<p>React doesn't prescribe a specific approach to data fetching, but people commonly use either a library like <a href="https://github.com/axios/axios">axios</a> or the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API"><code>fetch()</code> API</a> provided by the browser.</p>
|
||
"/><meta property="og:image" content="https://create-react-app.dev/img/logo-og.png"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://create-react-app.dev/img/logo-og.png"/><link rel="shortcut icon" href="/img/favicon/favicon.ico"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script src="https://unpkg.com/vanilla-back-to-top@7.1.14/dist/vanilla-back-to-top.min.js"></script><script>
|
||
document.addEventListener('DOMContentLoaded', function() {
|
||
addBackToTop(
|
||
{"zIndex":100}
|
||
)
|
||
});
|
||
</script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/"><img class="logo" src="/img/logo.svg" alt="Create React App"/><h2 class="headerTitleWithLogo">Create React App</h2></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/getting-started" target="_self">Docs</a></li><li class=""><a href="https://reactjs.org/community/support.html" target="_self">Help</a></li><li class=""><a href="https://www.github.com/facebook/create-react-app" target="_self">GitHub</a></li><li class="navSearchWrapper reactNavSearchWrapper"><input type="text" id="search_input_react" placeholder="Search" title="Search"/></li></ul></nav></div></header></div></div><div class="navPusher"><div class="docMainWrapper wrapper"><div class="container docsNavContainer" id="docsNav"><nav class="toc"><div class="toggleNav"><section class="navWrapper wrapper"><div class="navBreadcrumb wrapper"><div class="navToggle" id="navToggler"><i></i></div><h2><i>›</i><span>Back-End Integration</span></h2><div class="tocToggler" id="tocToggler"><i class="icon-toc"></i></div></div><div class="navGroups"><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Welcome<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/documentation-intro">About Docs</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Getting Started<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/getting-started">Getting Started</a></li><li class="navListItem"><a class="navItem" href="/docs/folder-structure">Folder Structure</a></li><li class="navListItem"><a class="navItem" href="/docs/available-scripts">Available Scripts</a></li><li class="navListItem"><a class="navItem" href="/docs/supported-browsers-features">Supported Browsers and Features</a></li><li class="navListItem"><a class="navItem" href="/docs/updating-to-new-releases">Updating to New Releases</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Development<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/setting-up-your-editor">Editor Setup</a></li><li class="navListItem"><a class="navItem" href="/docs/developing-components-in-isolation">Developing Components in Isolation</a></li><li class="navListItem"><a class="navItem" href="/docs/analyzing-the-bundle-size">Analyzing Bundle Size</a></li><li class="navListItem"><a class="navItem" href="/docs/using-https-in-development">HTTPS in Development</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Styles and Assets<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/adding-a-stylesheet">Adding Stylesheets</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-a-css-modules-stylesheet">Adding CSS Modules</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-a-sass-stylesheet">Adding Sass Stylesheets</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-css-reset">Adding CSS Reset</a></li><li class="navListItem"><a class="navItem" href="/docs/post-processing-css">Post-Processing CSS</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-images-fonts-and-files">Adding Images, Fonts, and Files</a></li><li class="navListItem"><a class="navItem" href="/docs/loading-graphql-files">Loading .graphql Files</a></li><li class="navListItem"><a class="navItem" href="/docs/using-the-public-folder">Using the Public Folder</a></li><li class="navListItem"><a class="navItem" href="/docs/code-splitting">Code Splitting</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Building your App<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/installing-a-dependency">Installing a Dependency</a></li><li class="navListItem"><a class="navItem" href="/docs/importing-a-component">Importing a Component</a></li><li class="navListItem"><a class="navItem" href="/docs/using-global-variables">Using Global Variables</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-bootstrap">Adding Bootstrap</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-flow">Adding Flow</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-typescript">Adding TypeScript</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-relay">Adding Relay</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-a-router">Adding a Router</a></li><li class="navListItem"><a class="navItem" href="/docs/adding-custom-environment-variables">Environment Variables</a></li><li class="navListItem"><a class="navItem" href="/docs/making-a-progressive-web-app">Making a Progressive Web App</a></li><li class="navListItem"><a class="navItem" href="/docs/production-build">Creating a Production Build</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Testing<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/running-tests">Running Tests</a></li><li class="navListItem"><a class="navItem" href="/docs/debugging-tests">Debugging Tests</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Back-End Integration<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/proxying-api-requests-in-development">Proxying in Development</a></li><li class="navListItem navListItemActive"><a class="navItem" href="/docs/fetching-data-with-ajax-requests">Fetching Data</a></li><li class="navListItem"><a class="navItem" href="/docs/integrating-with-an-api-backend">Integrating with an API</a></li><li class="navListItem"><a class="navItem" href="/docs/title-and-meta-tags">Title & Meta Tags</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Deployment<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/deployment">Deployment</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Advanced Usage<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/can-i-use-decorators">Can I Use Decorators?</a></li><li class="navListItem"><a class="navItem" href="/docs/pre-rendering-into-static-html-files">Pre-Rendering Static HTML</a></li><li class="navListItem"><a class="navItem" href="/docs/advanced-configuration">Advanced Configuration</a></li><li class="navListItem"><a class="navItem" href="/docs/alternatives-to-ejecting">Alternatives to Ejecting</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Support<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/troubleshooting">Troubleshooting</a></li></ul></div></div></section></div><script>
|
||
var coll = document.getElementsByClassName('collapsible');
|
||
var checkActiveCategory = true;
|
||
for (var i = 0; i < coll.length; i++) {
|
||
var links = coll[i].nextElementSibling.getElementsByTagName('*');
|
||
if (checkActiveCategory){
|
||
for (var j = 0; j < links.length; j++) {
|
||
if (links[j].classList.contains('navListItemActive')){
|
||
coll[i].nextElementSibling.classList.toggle('hide');
|
||
coll[i].childNodes[1].classList.toggle('rotate');
|
||
checkActiveCategory = false;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
coll[i].addEventListener('click', function() {
|
||
var arrow = this.childNodes[1];
|
||
arrow.classList.toggle('rotate');
|
||
var content = this.nextElementSibling;
|
||
content.classList.toggle('hide');
|
||
});
|
||
}
|
||
|
||
document.addEventListener('DOMContentLoaded', function() {
|
||
createToggler('#navToggler', '#docsNav', 'docsSliderActive');
|
||
createToggler('#tocToggler', 'body', 'tocActive');
|
||
|
||
const headings = document.querySelector('.toc-headings');
|
||
headings && headings.addEventListener('click', function(event) {
|
||
if (event.target.tagName === 'A') {
|
||
document.body.classList.remove('tocActive');
|
||
}
|
||
}, false);
|
||
|
||
function createToggler(togglerSelector, targetSelector, className) {
|
||
var toggler = document.querySelector(togglerSelector);
|
||
var target = document.querySelector(targetSelector);
|
||
|
||
if (!toggler) {
|
||
return;
|
||
}
|
||
|
||
toggler.onclick = function(event) {
|
||
event.preventDefault();
|
||
|
||
target.classList.toggle(className);
|
||
};
|
||
}
|
||
});
|
||
</script></nav></div><div class="container mainContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/facebook/create-react-app/edit/master/docusaurus/docs/fetching-data-with-ajax-requests.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 class="postHeaderTitle">Fetching Data with AJAX Requests</h1></header><article><div><span><p>React doesn't prescribe a specific approach to data fetching, but people commonly use either a library like <a href="https://github.com/axios/axios">axios</a> or the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API"><code>fetch()</code> API</a> provided by the browser.</p>
|
||
<p>The global <code>fetch</code> function allows you to easily make AJAX requests. It takes in a URL as an input and returns a <code>Promise</code> that resolves to a <code>Response</code> object. You can find more information about <code>fetch</code> <a href="https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch">here</a>.</p>
|
||
<p>A Promise represents the eventual result of an asynchronous operation, you can find more information about Promises <a href="https://www.promisejs.org/">here</a> and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">here</a>. Both axios and <code>fetch()</code> use Promises under the hood. You can also use the <a href="https://davidwalsh.name/async-await"><code>async / await</code></a> syntax to reduce the callback nesting.</p>
|
||
<p>Make sure the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API"><code>fetch()</code> API</a> and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">Promises</a> are available in your target audience's browsers.
|
||
For example, support in Internet Explorer requires a <a href="https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md">polyfill</a>.</p>
|
||
<p>You can learn more about making AJAX requests from React components in <a href="https://reactjs.org/docs/faq-ajax.html">the FAQ entry on the React website</a>.</p>
|
||
</span></div></article></div><div class="docLastUpdate"><em>Last updated on 10/8/2018 by Kristofer Selbekk</em></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/proxying-api-requests-in-development"><span class="arrow-prev">← </span><span>Proxying in Development</span></a><a class="docs-next button" href="/docs/integrating-with-an-api-backend"><span>Integrating with an API</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/logo.svg" alt="Create React App" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/getting-started">Get Started</a><a href="https://reactjs.org/" target="_blank" rel="noreferrer noopener">Learn React</a></div><div><h5>Community</h5><a href="https://stackoverflow.com/questions/tagged/create-react-app" target="_blank" rel="noreferrer noopener">Stack Overflow</a><a href="https://spectrum.chat/create-react-app" target="_blank" rel="noreferrer noopener">Spectrum</a><a href="https://twitter.com/reactjs" target="_blank" rel="noreferrer noopener">Twitter</a></div><div><h5>More</h5><a href="https://www.github.com/facebook/create-react-app">GitHub</a><a class="github-button" href="https://github.com/facebook/create-react-app" data-icon="octicon-star" data-count-href="/facebook/create-react-app/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><a href="https://code.facebook.com/projects/" target="_blank" rel="noreferrer noopener" class="fbOpenSource"><img src="/img/oss_logo.png" alt="Facebook Open Source" width="170" height="45"/></a><section class="copyright">Copyright © 2019 Facebook Inc.</section></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
|
||
document.addEventListener('keyup', function(e) {
|
||
if (e.target !== document.body) {
|
||
return;
|
||
}
|
||
// keyCode for '/' (slash)
|
||
if (e.keyCode === 191) {
|
||
const search = document.getElementById('search_input_react');
|
||
search && search.focus();
|
||
}
|
||
});
|
||
</script><script>
|
||
var search = docsearch({
|
||
|
||
apiKey: '3be60f4f8ffc24c75da84857d6323791',
|
||
indexName: 'create-react-app',
|
||
inputSelector: '#search_input_react'
|
||
});
|
||
</script></body></html> |