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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Using Global Variables · Create React App</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="<p>When you include a script in the HTML file that defines global variables and try to use one of these variables in the code, the linter will complain because it cannot see the definition of the variable.</p>
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</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/using-global-variables.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 class="postHeaderTitle">Using Global Variables</h1></header><article><div><span><p>When you include a script in the HTML file that defines global variables and try to use one of these variables in the code, the linter will complain because it cannot see the definition of the variable.</p>
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<p>You can avoid this by reading the global variable explicitly from the <code>window</code> object, for example:</p>
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<pre><code class="hljs css language-js"><span class="hljs-keyword">const</span> $ = <span class="hljs-built_in">window</span>.$;
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</code></pre>
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<p>This makes it obvious you are using a global variable intentionally rather than because of a typo.</p>
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<p>Alternatively, you can force the linter to ignore any line by adding <code>// eslint-disable-line</code> after it.</p>
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</span></div></article></div><div class="docLastUpdate"><em>Last updated on 10/7/2018 by Kristofer Selbekk</em></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/importing-a-component"><span class="arrow-prev">← </span><span>Importing a Component</span></a><a class="docs-next button" href="/docs/adding-bootstrap"><span>Adding Bootstrap</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>
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