mirror of
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synced 2025-11-01 09:12:30 +00:00
Paul O’Shannessy
62c4231389
Use `bundle exec rake release` to make sure the right gem versions are used, which reverts some of the trivial markdown related changes from last time.
521 lines
18 KiB
HTML
521 lines
18 KiB
HTML
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<a href="/react/tips/false-in-jsx.html">False in JSX</a>
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<a href="/react/tips/children-undefined.html">this.props.children undefined</a>
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<div class="inner-content">
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<h1>Load Initial Data via AJAX</h1>
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<div class="subHeader"></div>
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<p>Fetch data in <code>componentDidMount</code>. When the response arrives, store the data in state, triggering a render to update your UI.</p>
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<p>When processing the response of an asynchronous request, be sure to check that the component is still mounted before updating its state by using <code>this.isMounted()</code>.</p>
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<p>This example fetches the desired Github user's latest gist:</p>
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<div class="highlight"><pre><code class="js language-js" data-lang="js"><span class="cm">/** @jsx React.DOM */</span>
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<span class="kd">var</span> <span class="nx">UserGist</span> <span class="o">=</span> <span class="nx">React</span><span class="p">.</span><span class="nx">createClass</span><span class="p">({</span>
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<span class="nx">getInitialState</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
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<span class="k">return</span> <span class="p">{</span>
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<span class="nx">username</span><span class="o">:</span> <span class="s1">''</span><span class="p">,</span>
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<span class="nx">lastGistUrl</span><span class="o">:</span> <span class="s1">''</span>
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<span class="p">};</span>
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<span class="p">},</span>
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<span class="nx">componentDidMount</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
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<span class="nx">$</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">props</span><span class="p">.</span><span class="nx">source</span><span class="p">,</span> <span class="kd">function</span><span class="p">(</span><span class="nx">result</span><span class="p">)</span> <span class="p">{</span>
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<span class="kd">var</span> <span class="nx">lastGist</span> <span class="o">=</span> <span class="nx">result</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span>
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<span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">isMounted</span><span class="p">())</span> <span class="p">{</span>
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<span class="k">this</span><span class="p">.</span><span class="nx">setState</span><span class="p">({</span>
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<span class="nx">username</span><span class="o">:</span> <span class="nx">lastGist</span><span class="p">.</span><span class="nx">owner</span><span class="p">.</span><span class="nx">login</span><span class="p">,</span>
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<span class="nx">lastGistUrl</span><span class="o">:</span> <span class="nx">lastGist</span><span class="p">.</span><span class="nx">html_url</span>
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<span class="p">});</span>
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<span class="p">}</span>
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<span class="p">}.</span><span class="nx">bind</span><span class="p">(</span><span class="k">this</span><span class="p">));</span>
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<span class="p">},</span>
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<span class="nx">render</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
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<span class="k">return</span> <span class="p">(</span>
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<span class="o"><</span><span class="nx">div</span><span class="o">></span>
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<span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">.</span><span class="nx">username</span><span class="p">}</span><span class="err">'</span><span class="nx">s</span> <span class="nx">last</span> <span class="nx">gist</span> <span class="nx">is</span>
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<span class="o"><</span><span class="nx">a</span> <span class="nx">href</span><span class="o">=</span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">.</span><span class="nx">lastGistUrl</span><span class="p">}</span><span class="o">></span><span class="nx">here</span><span class="o"><</span><span class="err">/a>.</span>
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<span class="o"><</span><span class="err">/div></span>
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<span class="p">);</span>
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<span class="p">}</span>
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<span class="p">});</span>
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<span class="nx">React</span><span class="p">.</span><span class="nx">renderComponent</span><span class="p">(</span>
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<span class="o"><</span><span class="nx">UserGist</span> <span class="nx">source</span><span class="o">=</span><span class="s2">"https://api.github.com/users/octocat/gists"</span> <span class="o">/></span><span class="p">,</span>
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<span class="nx">mountNode</span>
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<span class="p">);</span>
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</code></pre></div>
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A Facebook & Instagram collaboration.<br>
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<a href="/react/acknowledgements.html">Acknowledgements</a>
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<div class="right">© 2014 Facebook Inc.</div>
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